I. ˈpin-ˌpȯint noun
Date: 1849
1. : something that is extremely small or insignificant
2. : the point of a pin
3. : an extremely small or sharp point
II. adjective
Date: 1897
1. : extremely fine or precise
2. : located, fixed, or directed with extreme precision
pinpoint targets
3. : small as a pinpoint
III. transitive verb
Date: 1917
1. : to locate or aim with great precision or accuracy
pinpoint a source
2.
a. : to fix, determine, or identify with precision
pinpoint the cause
b. : to cause to stand out conspicuously : highlight