foundered Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. fail utterly; collapse; 2 sink below the surface 3 break down literally or metaphorically; Example Sentence The horse walked with a limp because she had been foundered. Synonyms fall flat; flop; collapse Antonyms succeed Hear It! Say It! Write It! foundered Switch to cursive Start Share with your friends: