lifespan

  1. Noun.  The length of time for which an organism lives.
  2. Noun.  (by extension) The length of time for which something exists or is current or valid.

This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license.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.