skill

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Proficiency, facility, or dexterity that is acquired or developed through training or experience. See Synonyms at ability.
2. n. An art, trade, or technique, particularly one requiring use of the hands or body.
3. n. A developed talent or ability: writing skills.
4. n. Obsolete A reason; a cause.

Century Dictionary and Cyclopedia

1. To set apart; separate.
2. Hence, to discern; have knowledge or understanding (to); know how: usually with an infinitive.
3. To have perception or comprehension; have understanding; discern: followed by of or on.
4. To have personal and practical knowledge (of); be versed or practised; hence, to be expert or dexterous: commonly followed by of.
5. To make difference; signify; matter: used impersonally, and generally with a negative.
6. n. The discriminating or reasoning faculty; the mind.
7. n. Discriminative power; discernment; understanding; reason; wit.
8. n. Reasonableness; propriety; rightness; justice; proper course; wise measure; also, rightful claim; right.
9. n. Reasoning; argument; proof; also, cause; reason.
10. n. Practical knowledge and ability; power of action or execution; readiness and excellence in applying wisdom or science to practical ends; expertness; dexterity.
11. n. A particular power, ability, or art; a gift or attainment; an accomplishment.
12. n. That for which one is specially qualified; one's forte.
13. n. Synonyms Facility, knack. See adroit.

Wiktionary

1. v. transitive To set apart; separate.
2. v. transitive To discern; have knowledge or understanding; to know how (to).
3. v. intransitive To have knowledge or comprehension; discern.
4. v. intransitive To have personal or practical knowledge of; be versed or practised; be expert or dextrous.
5. v. intransitive, archaic To make a difference; signify; matter.
6. n. Capacity to do something well; technique, ability. Skills are usually acquired or learned, as opposed to abilities, which are often thought of as innate.
7. adj. UK, slang great, excellent

GNU Webster's 1913

1. n. obsolete Discrimination; judgment; propriety; reason; cause.
2. n. obsolescent Knowledge; understanding.
3. n. The familiar knowledge of any art or science, united with readiness and dexterity in execution or performance, or in the application of the art or science to practical purposes; power to discern and execute; ability to perceive and perform; expertness; aptitude.
4. n. obsolete Display of art; exercise of ability; contrivance; address.
5. n. obsolete Any particular art.
6. v. obsolete To know; to understand.
7. v. obsolete To be knowing; to have understanding; to be dexterous in performance.
8. v. To make a difference; to signify; to matter; -- used impersonally.

WordNet 3.0

1. n. an ability that has been acquired by training
2. n. ability to produce solutions in some problem domain