Source : Webster's Revised Unabridged Dictionary (1913)

Inn \Inn\, v. i. [imp. & p. p. {Inned}; p. pr. & vb. n.
   {Inning}.]
   To take lodging; to lodge. [R.] --Addison.

Inning \In"ning\, n. [AS. innung, fr. in in, prep. & adv.]
   1. Ingathering; harvesting. [Obs.] --Holland.

   2. The state or turn of being in; specifically, in cricket,
      baseball, etc.,the turn or time of a player or of a side
      at the bat; -- often in the pl. Hence: The turn or time of
      a person, or a party, in power; as, the Whigs went out,
      and the Democrats had their innings.

   3. pl. Lands recovered from the sea. --Ainsworth.

Source : WordNet®

inning
     n : a period of play in baseball during which each team has a
         turn at bat [syn: {frame}]