Omnis is a Latin adjective meaning "all" or "every." In Elementary Latin, it is a third declension adjective that agrees with the noun it modifies in gender, number, and case.
Omnis is the Latin adjective you use when you want to say “all,” “every,” or “the whole of” something. In Elementary Latin, it shows up as a third declension adjective, so it does not follow the familiar -us, -a, -um pattern you see with first and second declension adjectives.
Its basic forms are omnis for masculine or feminine singular, omne for neuter singular, and omnes for plural. That means the word changes depending on what noun it describes. If the noun is singular and masculine or feminine, you use omnis. If the noun is singular and neuter, you use omne. If the idea is plural, omnes is the form you will see most often.
The reason omnis matters in Latin is agreement. Latin does not just give adjectives a single dictionary meaning and leave them untouched. The adjective has to match the noun in gender, number, and case, so you need to look at the noun first and then build the adjective form to fit it. That is why omnis is usually taught alongside adjective agreement and declension patterns, not as an isolated vocabulary word.
A common phrase is omnes homines, meaning “all people” or “all men” depending on context. Here, omnes agrees with homines in number and case. Another useful point is that omnis can feel broader than a simple adjective like bonus or fortis, because it often signals totality or universality, not just description.
In reading practice, omnis is a good word to slow down for. If you see it in a sentence, ask what group is being made complete: all citizens, every friend, the whole army, or every part of a thing. That habit makes translation cleaner and helps you avoid treating omnis like a fixed phrase instead of a form-changing adjective.
Omnis matters because it gives you one of the most common Latin ways to express totality. Once you can recognize it, you can translate sentences more accurately, especially when the author is making a broad statement about a whole group rather than just a few members.
It also gives you practice with third declension adjectives, which are a big step up from the more familiar first and second declension patterns. Since omnis has forms like omnis, omne, and omnes, it trains you to notice endings carefully instead of guessing from the English meaning alone.
This term also connects directly to adjective agreement. If you see omnes homines, you can check that omnes matches the plural noun homines. If you see omne bellum, you know the noun is neuter singular and the adjective has to fit that shape. That skill carries over to other third declension adjectives in your reading.
In class, omnis is the kind of word that shows whether you are reading for meaning or just spotting vocabulary. You have to know both the dictionary sense and the grammar around it, because the ending tells you how the word functions in the sentence. That makes it a good checkpoint for translating short passages and for explaining why a particular Latin phrase means “everyone,” “everything,” or “the whole.”
Keep studying Elementary Latin Unit 4
Visual cheatsheet
view gallerydeclension
Omnis belongs to the third declension, so its forms change in a pattern that is different from first and second declension adjectives. When you identify the declension, you know what kinds of endings to expect and how to match the adjective to the noun. That makes declension the starting point for reading omnis correctly.
adjective agreement
Omnis has to agree with the noun it describes in gender, number, and case. That is why omnis can appear as omnis, omne, or omnes depending on the noun. If the adjective form does not match the noun, the translation will feel off even if you know the vocabulary.
singular/plural
The difference between omnis and omnes is one of number. Singular forms point to one person or thing, while plural forms point to a group. With omnis, that number change often changes the meaning from “every one” to “all,” so number is a major clue in translation.
nominative singular
The nominative singular is the form you usually see in dictionary listings and vocabulary drills. For omnis, the nominative singular form helps you recognize the word before it changes in a sentence. Once you can spot the nominative singular, it becomes easier to trace how the adjective shifts in real texts.
A quiz question or translation exercise will usually ask you to identify omnis, give its meaning, and explain why it has that ending in the sentence. Your job is to check the noun it modifies, then decide whether the adjective is singular or plural and whether it is masculine, feminine, or neuter. If you are translating a short passage, omnis often changes the whole tone of the sentence because it turns a specific noun into a total group. In a grammar question, you may also need to name it as a third declension adjective and match it with the correct case ending.
Omnis means “all” or “every,” but in Latin it changes form to match the noun it modifies.
The main forms you should know are omnis, omne, and omnes.
Because omnis is a third declension adjective, its pattern does not look like the familiar -us, -a, -um adjectives.
When you translate omnis, always check the noun’s gender, number, and case first.
Phrases like omnes homines show how omnis can express totality or universality in a sentence.
Omnis is a Latin adjective meaning “all” or “every.” In Elementary Latin, you study it as a third declension adjective that changes form to agree with the noun it modifies. The most common forms are omnis, omne, and omnes.
The forms you usually meet first are omnis for masculine or feminine singular, omne for neuter singular, and omnes for plural. Since it is a third declension adjective, the rest of its forms follow the third declension pattern rather than the first/second declension pattern. That is why it looks a little less regular than adjectives like bonus or magna.
Omnes homines means “all people” or “all men,” depending on context. Omnes is plural, so it matches homines as a plural noun. This phrase is a simple example of how omnis can express a whole group instead of just one person or thing.
Omnis is an adjective, not a noun. It describes a noun and agrees with it in gender, number, and case. If you see it in a sentence, look for the noun it modifies before translating it.