1. Noun.  (biology, taxonomy) a rank in the classification of organisms, below family and above species; a taxon at that rank.
  2. Noun.  A group with common attributes.
  3. Noun.  (topology) A number measuring some aspect of the complexity of any of various manifolds or graphs.
  4. Noun.  (semantics) Within a definition, a broader category of the defined concept.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.

This entry was last updated on RefTopia from its source on 3/20/2012.