reservoirs Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a place where something is kept in store especially an artificial or natural lake where water is collected as a water supply Example Sentence it's important to maintain water reservoirs. Synonyms lake; reserve; pond; pool; store Antonyms drain Hear It! Say It! Write It! reservoirs Switch to cursive Start Share with your friends: