Greaves is a small lunar impact crater that lies near the southwest edge of Mare Crisium.

It is a circular, bowl-shaped formation with a small interior floor at the center of the sloping inner walls.

The crater is intruding into the northern edge of the lava-flooded crater Lick.

To the northwest is Yerkes, and to the northeast is Picard.

This formation was previously designated Lick D, a satellite crater of Lick, before it was given a name by the IAU.