/puy"nap'euhl/ , n.
1. the edible, juicy, collective fruit of a tropical, bromeliaceous plant, Ananas comosus, that develops from a spike or head of flowers and is surmounted by a crown of leaves.
2. the plant itself, having a short stem and rigid, spiny-margined, recurved leaves.
3. Mil. Slang. a fragmentation hand grenade.
[ 1350-1400 for earlier sense; 1655-65 for def. 1; ME pinappel pine cone; see PINE 1 , APPLE ]