WordNet (r) 3.0 (2006):
pinpoint n 1: a very brief moment; "they were strangers sharing a pinpoint of time together" 2: a very small spot; "the plane was just a speck in the sky" [syn: speck, pinpoint] 3: the sharp point of a pin v 1: locate exactly; "can you pinpoint the position of the enemy?"; "The chemists could not nail the identity of the chromosome" [syn: pinpoint, nail]