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