omni

Omni is a combining form derived from the Latin omnis meaning "all." In English, omni- functions as a prefix to form words that denote universality or totality, and it also appears in compounds borrowed directly from Latin. The prefix is used across disciplines to signify breadth rather than depth.

The prefix appears in words such as omnipresent (present everywhere), omniscient (having universal knowledge), omnipotent (having unlimited power), and omnivorous (feeding on all kinds of food). Other common examples include omnidirectional (in all directions), omniform (taking many forms), and omnibus (a collection of works or a vehicle designed to carry many passengers). The sense of "all" is central to these terms.

In theology and philosophy, omn- is frequent in discussing the attributes of deity, with terms like omniscience, omnipotence, and omnibenevolence denoting perfect knowledge, power, and benevolence. The word omnibenevolent is less common but used in theological discussions.

The form omni- is also found in technical and general writing as a productive prefix, and is often paired with nouns to indicate all-encompassing scope. The term "omni" can appear by itself in brand names or titles, but in standard usage it functions primarily as a bound morpheme rather than an independent word.