Collins COBUILD Advanced Learner's English Dictionary - flying fish

(flying fish, or flying fishes) Flying fish are a type of fish that live in warm seas. They have large fins that enable them to move forward in the air when they jump out of the water. N-VAR FLYING SAUCER (flying saucers) A flying saucer is a round, flat object which some people say they have seen in the sky and which they believe to be a spacecraft from another planet. (OLD-FASHIONED) N-COUNT