chin

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The central forward portion of the lower jaw.
2. v. To pull (oneself) up with the arms while grasping an overhead horizontal bar until the chin is level with the bar.
3. v. Music To place (a violin) under the chin in preparation to play it.
4. v. To chin oneself.
5. v. Informal To make idle conversation; chatter.

Century Dictionary and Cyclopedia

1. n. The lower extremity of the face below the mouth; the point of the under jaw in man, or a corresponding part in other animals.
2. n. In zoology, the mentum.
3. n. In Rotifera, a ciliated muscular part or process just below the mouth.
4. To talk.
5. To talk to, especially with assurance or impudence.
6. In gymnastics, to lift the weight of the body by the arms on a horizontal bar until the chin is brought over the bar. Also used transitively: as, to chin the bar.
7. An abbreviation of China;
8. Chinese.

Wiktionary

1. n. endearing a chinchilla.
2. n. The bottom of a face, especially, the lower jaw or the region below the mouth.
3. n. slang, US talk.
4. n. slang, UK A falsehood.
5. n. boxing, uncountable The ability to withstand being punched in the face without being knocked out.
6. v. slang, intransitive To talk.
7. v. To perform a chin-up.
8. v. UK, transitive To punch (someone)'s chin (part of the body).

GNU Webster's 1913

1. n. The lower extremity of the face below the mouth; the point of the under jaw.
2. n. (Zoöl.) The exterior or under surface embraced between the branches of the lower jaw bone, in birds.

WordNet 3.0

1. v. raise oneself while hanging from one's hands until one's chin is level with the support bar
2. n. the protruding part of the lower jaw
3. n. Kamarupan languages spoken in western Burma and Bangladesh and easternmost India