Collins COBUILD Advanced Learner's English Dictionary - fell

(fells, felling, felled) 1. Fell is the past tense of fall. 2. If trees are felled, they are cut down. Badly infected trees should be felled and burned. VERB: usu passive, be V-ed 3. If you fell someone, you knock them down, for example in a fight. ...a blow on the forehead which felled him to the ground. VERB: V n 4. in one fell swoop: see swoop