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Phrase(s): flame up
1. [for something] to catch fire and burst into flames. • The trees flamed up one by one in the forest fire. • Suddenly the car flamed up and exploded. 2. [for a fire] to expand and send out larger flames. • The raging fire flamed up and jumped to even more trees. • As firemen opened the door and came in, the fire flamed up and filled the room.
McGrawhill's American Idioms And Phrasal Verbs