A ring (often ornamental and/or precious) designed to be worn on a finger.
A pitted, now usually metal, cup-shaped cap worn on the tip of a finger, which is used in sewing to push the needle through material.
As much as fills a thimble (sense 1); a thimbleful.
A metal ring which a cable or rope intended for attaching to other things is looped around as a protection against chafing.
A thimble or similar object used in thimblerig (“a game of skill which requires the bettor to guess under which of three thimbles or small cups a pea-sized object has been placed after the person operating the game rapidly rearranges them”).
A ring- or tube-shaped component such as a ferrule.
A socket in machinery shaped like a thimble.
To sew.
To use a thimble (noun sense 1).