/pin"poynt'/ , n.
1. the point of a pin.
2. a trifle; pinhead.
3. a tiny spot or sharp point.
v.t.
4. to locate or describe exactly or precisely: to pinpoint the problem.
adj.
5. exact; precise: pinpoint accuracy.
[ 1840-50; PIN + POINT ]
Syn. 3. spot, localize, identify, define.