1. (n.) A kind of frock for children.

2. (n.) See Jamb.

3. (v. t.) To press into a close or tight position; to crowd; to squeeze; to wedge in.

4. (v. t.) To crush or bruise; as, to jam a finger in the crack of a door.

5. (v. t.) To bring (a vessel) so close to the wind that half her upper sails are laid aback.

6. (n.) A mass of people or objects crowded together; also, the pressure from a crowd; a crush; as, a jam in a street; a jam of logs in a river.

7. (n.) An injury caused by jamming.

8. (n.) A preserve of fruit boiled with sugar and water; as, raspberry jam; currant jam; grape jam.

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