blade / blād/ • n. 1. the flat cutting edge of a knife, saw, or other tool or weapon. ∎ short for razor blade. ∎ poetic/lit. a sword. 2. the flat, wide section of an implement or device such as an oar or a propeller. ∎ a thin, flat metal runner on an ice skate. ∎ a shoulder bone in a cut of meat, or the cut of meat itself. ∎ the flat part of the tongue behind the tip. 3. a long, narrow leaf of grass or another similar plant: a blade of grass. ∎ Bot. the broad thin part of a leaf apart from the stalk. 4. inf., dated a dashing or energetic young man. DERIVATIVES: blad·ed adj. [in comb.] double-bladed paddles.
A. leaf OE.; spathe of grass XIV.
B. broad flattened part of an implement OE.; thin cutting edge, sword XIV. OE. blæd, pl. bladu = OS. blad, OHG. blat (G. blatt), ON. blnað leaf, etc. :- Gmc. *blaðam, perh. pp. formation (IE. *-tos) on the base *biō- BLOW2. The present form derives from OE. obl. cases.