humpback whale Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition noun. a large whale known for its long pectoral fins and hump-shaped back. Example Sentence We saw a humpback whale swimming with dolphins. More Example Sentences Many people enjoy watching humpback whales. Synonyms baleen whale; megaptera; marine mammal Antonyms puny Hear It! Say It! Write It! humpback whale Switch to cursive Start Share with your friends: