unilaterally

UK: /ˌjuːnɪˈlætər^əli/

WordReference Random House Learner's Dictionary of American English © 2025

u•ni•lat•er•al /ˌyunəˈlætərəl/   adj. 

1. undertaken or done by or on behalf of one side, party, or group only;
   not mutual:
   unilateral disarmament; a unilateral decision.

See -uni-, -lat-².

WordReference Random House Unabridged Dictionary of American English © 2025

u•ni•lat•er•al  (yo̅o̅′nə lat′ər əl), adj. 

1. relating to, occurring on, or involving one side only:
   unilateral development; a unilateral approach.
2. undertaken or done by or on behalf of one side, party, or faction only;
   not mutual:
   a unilateral decision; unilateral disarmament.
3. Mathematics having only one side or surface;
   without a reverse side or inside, as a Möbius strip.
4. Lawmaking
   • pertaining to a contract that can be formed only when the party to whom an offer is made renders the performance for which the offeror bargains.
   • pertaining to a contract in which obligation rests on only one party, as a binding promise to make a gift.
5. [Bot.] having all the parts disposed on one side of an axis, as an inflorescence.
6. Anthropology through forebears of one sex only, as through either the mother's or father's line. Cf. bilateral (def. 5).
7. Phonetics (of an l-sound) characterized by passage of air on only one side of the tongue.

• Neo-Latin ūnilaterālis. See uni-, lateral
• 1795–1805

u′ni•lat′er•al′i•ty, n. 
u′ni•lat′er•al•ly, adv.