
An icon is a religious work of art, most commonly a painting, in the cultures of the Eastern Orthodox, Oriental Orthodox, and Catholic churches. They are not simply artworks; "an icon is a sacred image used in religious devotion". The most common subjects include Christ, Mary, saints and angels. Although especially associated with portrait-style images concentrating on one or two main figures, the term also covers most of the religious images in a variety of artistic media produced by Eastern Christianity, including narrative scenes, usually from the Bible or the lives of saints.

Iconoclasm is the social belief in the importance of the destruction of icons and other images or monuments, most frequently for religious or political reasons. People who engage in or support iconoclasm are called iconoclasts, a term that has come to be figuratively applied to any individual who challenges "cherished beliefs or venerated institutions on the grounds that they are erroneous or pernicious."

Religion in pre-Islamic Arabia included indigenous Arabian polytheism, ancient Semitic religions, Christianity, Judaism, Mandaeism, and Zoroastrianism.

In religious belief, a saint is a person who is recognized as having an exceptional degree of holiness, likeness, or closeness to God. However, the use of the term saint depends on the context and denomination. In Catholic, Eastern Orthodox, Anglican, Oriental Orthodox, and Lutheran doctrine, all of their faithful deceased in Heaven are considered to be saints, but some are considered worthy of greater honor or emulation. Official ecclesiastical recognition, and consequently a public cult of veneration, is conferred on some denominational saints through the process of canonization in the Catholic Church or glorification in the Eastern Orthodox Church after their approval.
Hindu deities are the gods and goddesses in Hinduism. The terms and epithets for deities within the diverse traditions of Hinduism vary, and include Deva, Devi, Ishvara, Ishvari, Bhagavān and Bhagavati.

Veneration, or veneration of saints, is the act of honoring a saint, a person who has been identified as having a high degree of sanctity or holiness. Angels are shown similar veneration in many religions. Veneration of saints is practiced, formally or informally, by adherents of some branches of all major religions, including Christianity, Judaism, Hinduism, Islam, Buddhism and Jainism.
Shirk in Islam is the sin of idolatry or polytheism. Islam teaches that God does not share his divine attributes with anyone. Associating partners with God is disallowed according to the Islamic doctrine of Tawhid (oneness). Mušrikūn مشركون are those who practice shirk, which literally means "association" and refers to accepting other gods and divinities alongside God. The Qur'an considers shirk as a sin that will not be forgiven if a person dies without repenting of it.

A shrine is a sacred or holy space dedicated to a specific deity, ancestor, hero, martyr, saint, daemon, or similar figure of respect, wherein they are venerated or worshipped. Shrines often contain idols, relics, or other such objects associated with the figure being venerated. A shrine at which votive offerings are made is called an altar.

In the Hindu tradition, a murti is a devotional image such as a statue, or icon, or idol of a deity or saint. In Hindu temples, it is a symbolic icon. Thus, not all Hindu images of gods and saints are murti, for example, purely decorative sculptures in temples and on the streets. A murti is itself not a god in Hinduism, but it is a shape, embodiment, or manifestation of a deity.
Idolatry in Judaism is prohibited. Judaism holds that idolatry is not limited to the worship of an idol itself, but also worship involving any artistic representations of God. The prohibition is epitomized by the first two "words" of the decalogue: I am the Lord thy God, Thou shalt have no other gods before me, and Thou shalt not make unto thee any graven image or any image in the sky, on earth or in the sea. These prohibitions are re-emphasized repeatedly by the later prophets, suggesting the ongoing appeal of Canaanite religion and syncretic assimilation to the ancient Israelites.

Religious images in Christian theology have a role within the liturgical and devotional life of adherents of certain Christian denominations. The use of religious images has often been a contentious issue in Christian history. Concern over idolatry is the driving force behind the various traditions of aniconism in Christianity.

In the practice of religion, a cult image is a human-made object that is venerated or worshipped for the deity, spirit or daemon that it embodies or represents. In several traditions, including the ancient religions of Egypt, Greece and Rome, and modern Hinduism, cult images in a temple may undergo a daily routine of being washed, dressed, and having food left for them. Processions outside the temple on special feast days are often a feature. Religious images cover a wider range of all types of images made with a religious purpose, subject, or connection. In many contexts "cult image" specifically means the most important image in a temple, kept in an inner space, as opposed to what may be many other images decorating the temple.

Aniconism is the prohibition of the veneration of images practiced in some forms of Christianity.
Hinduism and Sikhism are Indian religions. Hinduism has pre-historic origins, while Sikhism was founded in the 15th century by Guru Nanak. Both religions share many philosophical concepts such as Karma, Dharma, Mukti, Maya although both religions have different interpretation of some of these concepts.
Bibliolatry is the worship of a book, idolatrous homage to a book, or the deifying of a book. It is a form of idolatry. The sacred texts of some religions disallow icon worship, but over time the texts themselves are treated as sacred the way idols are, and believers may end up effectively worshipping the book. Bibliolatry extends claims of inerrancy—hence perfection—to the texts, precluding theological innovation, evolving development, or progress. Bibliolatry can lead to revivalism, disallows re-probation, and can lead to persecution of unpopular doctrines.

The Byzantine Iconoclasm were two periods in the history of the Byzantine Empire when the use of religious images or icons was opposed by religious and imperial authorities within the Christian church and the temporal imperial hierarchy. The First Iconoclasm, as it is sometimes called, occurred between about 726 and 787, while the Second Iconoclasm occurred between 814 and 842. According to the traditional view, Byzantine Iconoclasm was started by a ban on religious images promulgated by the Byzantine Emperor Leo III the Isaurian, and continued under his successors. It was accompanied by widespread destruction of religious images and persecution of supporters of the veneration of images. The Papacy remained firmly in support of the use of religious images throughout the period, and the whole episode widened the growing divergence between the Byzantine and Carolingian traditions in what was still a unified European Church, as well as facilitating the reduction or removal of Byzantine political control over parts of the Italian Peninsula.

Polytheism is the belief in multiple deities, which are usually assembled into a pantheon of gods and goddesses, along with their own religious sects and rituals. Polytheism is a type of theism. Within theism, it contrasts with monotheism, the belief in a singular God who is, in most cases, transcendent. In religions that accept polytheism, the different gods and goddesses may be representations of forces of nature or ancestral principles; they can be viewed either as autonomous or as aspects or emanations of a creator deity or transcendental absolute principle, which manifests immanently in nature. Polytheists do not always worship all the gods equally; they can be henotheists, specializing in the worship of one particular deity, or kathenotheists, worshiping different deities at different times.

The phrase false god is a derogatory term used in Abrahamic religions to indicate cult images or deities of non-Abrahamic Pagan religions, as well as other competing entities or objects to which particular importance is attributed. Conversely, followers of animistic and polytheistic religions may regard the gods of various monotheistic religions as "false gods", because they do not believe that any real deity possesses the properties ascribed by monotheists to their sole deity. Atheists, who do not believe in any deities, do not usually use the term false god even though that would encompass all deities from the atheist viewpoint. Usage of this term is generally limited to theists, who choose to worship some deity or deities, but not others.

"Thou shalt not make unto thee any graven image" is an abbreviated form of one of the Ten Commandments which, according to the Book of Deuteronomy, were spoken by God to the Israelites and then written on stone tablets by the Finger of God. It continues, "... any graven image, or any likeness [of any thing] that [is] in heaven above, or that [is] in the earth beneath, or that [is] in the water under earth: Thou shalt not bow down thyself to them, nor serve them."

Sikhism prohibits idolatry, in accordance with mainstream Khalsa norms and the teachings of the Sikh Gurus, a position that has been accepted as orthodox.