high roller Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a person who spends or gambles a lot of money. Example Sentence John is known as a high roller in the casino because he always places large bets. Synonyms big spender; gambler; risk-taker Antonyms penny-pincher; saver Hear It! Say It! Write It! high roller Switch to cursive Start Share with your friends: