acacias Get Printable Handwriting Watch Say It Video Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. a type of tree or shrub with yellow flowers and often thorns. Example Sentence The giraffe ate leaves from the acacias. More Example Sentences Many birds like to nest in acacias. Synonyms mimosa; wattle Antonyms grass Hear It! Say It! Write It! acacias Switch to cursive Start Share with your friends: Watch Say It Video