Grade 9 plunges Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition verb. to dive or fall quickly into something, usually water. Example Sentence The diver plunges quickly into the ocean. More Example Sentences The boy plunges into the pool with a big splash. Synonyms dives; jumps; falls Antonyms rises; ascends; climbs Hear It! Say It! Write It! plunges Switch to cursive Start Share with your friends: