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a combining form meaning “all,” used in the formation of compound words: omnifarious; omnipotence; omniscient.
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Origin of omni-

<Latin, combining form of omnis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022


What does omni- mean?

Omni– is a combining form used like a prefix meaning “all.” It is often used in scientific and technical terms.

Omni– comes from Latin omnis, meaning “all.” The Greek translation of omnis is pâs “all, each, every,” which is the source of the combining forms pan and panto, as in panorama and pantomime. To learn more, check out our Words That Use articles for the combining forms pan-, pant, and panto-.

Examples of omni-

An example of a technical term that features the form omni– is omnigraph, “a device for converting Morse Code signals that are punched on a tape into audio signals, used in the training of telegraph operators.”

We know the form omni– means “all,” but what about the graph part of omnigraph? The form –graph means “drawn” or “written,” and is specifically used “to indicate the instrument rather than the written product of the instrument.” Omnigraph literally translates to “draw-all” or “write-all.”

What are some words that use the combining form omni-?

What are some other forms that omni– may be commonly confused with?

Break it down!

Given the meaning of omni-, what does omnisexual mean?

How to use omni- in a sentence

British Dictionary definitions for omni-


combining form
all or everywhereomnipresent

Word Origin for omni-

from Latin omnis all
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012