fell 1 (f?l)tr.v. felled, fell·ing, fells 1. a. To cause to fall by striking; cut or knock down: fell a tree; fell an opponent in boxing.b. To kill: was felled by an assassin’s bullet.2. To sew or finish (a seam) with the raw edges flattened, turned under, and stitched down.n.1. The timber cut down in one season.2. A felled seam.[Middle English fellen, from Old English fellan, fyllan.]fell?a·ble adj.fell 2 (f?l)adj.1. Of an inhumanly cruel nature; fierce: fell hordes.2. Capable of destroying; lethal: a fell blow.3. Dire; sinister: by some fell chance.4. Scots Sharp and biting.Idiom: at/in one fell swoop All at once.[Middle English fel, from Old French, variant of felon; see felon1.]fell?ness n.fell 3 (f?l)n.1. The hide of an animal; a pelt.2. A thin membrane directly beneath the hide.[Middle English fel, from Old English fell; see pel- in Indo-European roots.]fell 4 (f?l)n.1. Chiefly British An upland stretch of open country; a moor.2. A barren or stony hill.[Middle English fel, from Old Norse fell, fjall, mountain, hill.]fell 5 (f?l)v.Past tense of fall.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Felling (?f?l??) n (Placename) a town in NE England, in Gateshead unitary authority, Tyne and Wear; formerly noted for coal mining. Pop: 34 196 (2001)Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014