floodgates Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural noun. gates used to control water flow in rivers or canals. Example Sentence Floodgates may be used to lower the water levels in a river. Spelled as 1 word. More Example Sentences They closed the floodgates to prevent flooding. Synonyms gates; barriers; controls Antonyms ocean Hear It! Say It! Write It! floodgates Switch to cursive Start Share with your friends: