Worship in the context of "Prostration"

A ritual is a repeated, structured sequence of actions or behaviors that alters the internal or external state of an individual, group, or environment, regardless of conscious understanding, emotional context, or symbolic meaning. Traditionally associated with gestures, words, or revered objects, rituals also occur in non-human species, such as elephant mourning or corvid object-leaving. They may be prescribed by tradition, including religious practices, and are often characterized by formalism, traditionalism, rule-governance, and performance.

Rituals are a feature of all known human societies. They include not only the worship rites and sacraments of organized religions and cults, but also rites of passage, atonement and purification rites, oaths of allegiance, dedication ceremonies, coronations and presidential inaugurations, marriages, funerals and more. Even common actions like hand-shaking and saying "hello" may be termed as rituals.

A deity or god is a supernatural being considered to be sacred and worthy of worship due to having authority over some aspect of the universe and/or life. The Oxford Dictionary of English defines deity as a god or goddess, or anything revered as divine. C. Scott Littleton defines a deity as "a being with powers greater than those of ordinary humans, but who interacts with humans, positively or negatively, in ways that carry humans to new levels of consciousness, beyond the grounded preoccupations of ordinary life".

Religions can be categorized by how many deities they worship. Monotheistic religions accept only one deity (predominantly referred to as "God"), whereas polytheistic religions accept multiple deities. Henotheistic religions accept one supreme deity without denying other deities, considering them as aspects of the same divine principle. Nontheistic religions deny any supreme eternal creator deity, but may accept a pantheon of deities which live, die and may be reborn like any other being.

Freedom of religion or religious liberty, also known as freedom of religion or belief (FoRB), is a principle that supports the freedom of an individual or community, in public or private, to manifest religion or belief in teaching, practice, worship, and observance. It also includes the right not to profess any religion or belief or not to practice a religion, often called freedom from religion.

Freedom of religion is considered by many people and most nations to be a fundamental human right. Freedom of religion is protected in all the most important international human rights conventions, such as the United Nations International Covenant on Civil and Political Rights, the American Convention on Human Rights, the European Convention on Human Rights, and the United Nations Convention on the Rights of the Child. In a country with a state religion, freedom of religion is generally considered to mean that the government permits religious practices of other communities besides the state religion, and does not persecute believers in other faiths or those who have no faith. The concept of religious liberty includes, and some say requires, secular liberalism, and excludes authoritarian versions of secularism.

Liturgy is the customary public ritual of worship performed by a religious group. As a religious phenomenon, liturgy represents a communal response to and participation in the sacred through activities reflecting praise, thanksgiving, remembrance, supplication, or repentance. It forms a basis for establishing a relationship with God or the divine.

Technically speaking, liturgy forms a subset of ritual. The word liturgy, sometimes equated in English as "service", refers to a formal ritual enacted by those who understand themselves to be participating in an action with the divine.

The Liturgical Movement was a 19th- and 20th-century movement of scholarship for the reform of worship. It began in the Catholic Church and spread to many other Christian churches including the Anglican Communion, Lutheran and some other Protestant churches.

Religious art is a visual representation of religious ideologies and their relationship with humans. Sacred art directly relates to religious art in the sense that its purpose is for worship and religious practices. According to one set of definitions, artworks that are inspired by religion but are not considered traditionally sacred remain under the umbrella term of religious art, but not sacred art.

Other terms often used for art of various religions are cult image, usually for the main image in a place of worship, icon in its more general sense (not restricted to Eastern Orthodox images), and "devotional image" usually meaning a smaller image for private prayer or worship. Images can often be divided into "iconic images", just showing one or more figures, and "narrative images" showing moments from an episode or story involving sacred figures.