Annihilate: to destroy all traces of. This is the British English definition of annihilate.View American English definition of annihilate. What is the meaning of annihilate? Definition of annihilate written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, and count/noncount noun labels. annihilate meaning. Enrich your vocabulary with the English Definition … How to use annihilate in a sentence. Meaning and Definition of annihilate. All Free. Annihilate definition is - to cause to cease to exist : to do away with entirely so that nothing remains. View the pronunciation for annihilate. annihilate definition in the English Cobuild dictionary for learners, annihilate meaning explained, see also 'annihilation',animate',anticipate',animated', English vocabulary lates v. tr. 67 synonyms of annihilate from the Merriam-Webster Thesaurus, plus 194 related words, definitions, and antonyms. Synonyms, Antonyms, Derived Terms, Anagrams and senses of annihilate. Definition and synonyms of annihilate from the online English dictionary from Macmillan Education. annihilate somebody/something to defeat somebody/something completely She annihilated her opponent, who failed to win a single game. b. annihilate definition in English dictionary, annihilate meaning, synonyms, see also 'annihilative',annihilable',annihilator',annihilation'. Another word for annihilate. Word Origin late Middle English (originally as an adjective meaning ‘destroyed, annulled’): from late Latin annihilatus ‘reduced to nothing’, from the verb annihilare , from ad- ‘to’ + nihil ‘nothing’. What is annihilate? What are synonyms for annihilate? annihilate - WordReference English dictionary, questions, discussion and forums. What is the definition of annihilate? Find more ways to say annihilate, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. annihilate (v.) "reduce to nothing," 1520s, from Medieval Latin annihilatus, past participle of annihilare "reduce to nothing," from Latin ad "to" (see ad-) + nihil "nothing" (see nil).Related: Annihilated; annihilating. To destroy completely: The naval force was annihilated during the attack. Find another word for annihilate. Middle English had a past-participle adjective annichilate "destroyed, annulled, reduced to nothing" (late 14c. 1. a. How do you use annihilate in a sentence? Change your default dictionary to American English.