BY Antonyms There are 6 antonyms of the word by. (opposite meanings)Did you mean?Definition of BYAlso try opposite words for..byeBest Opposite Words For BYTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1awayadverbadv2against3from4towardsadverbadv5mainnoun, adjectiven, adj6principalnounn Alternatives for AWAY Words (5)asideoffforthoutoutsidePhrases (1)at bayOpposite words for away Alternatives for AGAINST Words (9)adverseanticonflictingcontrarycounterhostileopposedresistingversusOpposite words for against Alternatives for TOWARDS Words (9)advancingapproachingcominggoingheadingmovingpropellingnearingtowardsOpposite words for towards Alternatives for MAIN Words (14)chiefprimaryprincipalcentralessentialfundamentalkeyleadingmajorpredominantlargestbrinyindependentmasterOpposite words for main Alternatives for PRINCIPAL Words (23)chiefmainprimaryheaddominantfirstforemostleadingprimesuperiortopclientcorpusdealerdeandiapasonheadmasterheadmistressleadmasterproprietorringleaderstarPhrases (3)head teacherprincipal sumschool principalOpposite words for principal