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adjective Uncommon

unilateral

y-nih-LAT-uh-r

Unilateral (adjective) means Undertaken by only one side or party, without agreement from others involved. Example: “The country made a unilateral decision to withdraw its troops.”

adjective
1
Undertaken by only one side or party, without agreement from others involved.
"The country made a unilateral decision to withdraw its troops."
"Critics accused the CEO of making unilateral changes without consulting the board."

How to use unilateral

Learner’s notes

In plain EnglishDone by just one side, without the input or agreement of the other parties involved.

Common mistake

Often contrasted with "bilateral" (two sides) and "multilateral" (many sides) in political and legal contexts.

Easily confused with
bilateral multilateral
Common pairings
unilateral decision unilateral action unilateral ceasefire

Word forms

more unilateral comparative, most unilateral superlative

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Fill the gap

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The country made a _____ decision to withdraw its troops.

Etymology

Coined around 1802 from New Latin unilateralis, from Latin unus ("one") + lateralis ("sided").

Origin: New Latin · First attested 1802

Class of 1802 unilateral joined the language around 1802.
See the full Class of 1802 →
one-sided

Related words

Rhymes for unilateral

See all rhymes for unilateral →

Frequently asked questions

What does “unilateral” mean?

The word “unilateral” means undertaken by only one side or party, without agreement from others involved. In plain terms, done by just one side, without the input or agreement of the other parties involved.

How do you pronounce “unilateral”?

“Unilateral” is pronounced y-nih-LAT-uh-r ([ˌjʉː.nəˈɫæɾ.ɚ.ɻɫ̩] in IPA).

How do you use “unilateral” in a sentence?

Here is “unilateral” used in a sentence: “The country made a unilateral decision to withdraw its troops.”

What is another word for “unilateral”?

Words with a similar meaning to “unilateral” include one-sided.

What part of speech is “unilateral”?

“Unilateral” is an adjective.

Where does the word “unilateral” come from?

The word “unilateral” dates back to around 1802 and comes from New Latin. Coined around 1802 from New Latin unilateralis, from Latin unus ("one") + lateralis ("sided").

Is “unilateral” a common word?

“Unilateral” is an uncommon word in modern English.

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