1 a [more precise; most precise] : very accurate and exact
Be sure to take precise measurements before you cut the cloth.
The dating of very old materials has become more precise with new instruments.
a precise definition
b always used before a noun — used to refer to an exact and particular time, location, etc.
She quietly closed the door to the baby's room, and at just that precise moment the phone began to ring.
2 [more precise; most precise] : very careful and exact about the details of something
She is very precise in her work.