The Collaborative International Dictionary of English v.0.48:

Season \Sea"son\, n. [OE. sesoun, F. saison, properly, the
   sowing time, fr. L. satio a sowing, a planting, fr. serere,
   satum, to sow, plant; akin to E. sow, v., to scatter, as
   seed.]
   1. One of the divisions of the year, marked by alterations in
      the length of day and night, or by distinct conditions of
      temperature, moisture, etc., caused mainly by the relative
      position of the earth with respect to the sun. In the
      north temperate zone, four seasons, namely, spring,
      summer, autumn, and winter, are generally recognized. Some
      parts of the world have three seasons, -- the dry, the
      rainy, and the cold; other parts have but two, -- the dry
      and the rainy.
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            The several seasons of the year in their beauty.
                                                  --Addison.
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   2. Hence, a period of time, especially as regards its fitness
      for anything contemplated or done; a suitable or
      convenient time; proper conjuncture; as, the season for
      planting; the season for rest.
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            The season, prime for sweetest scents and airs.
                                                  --Milton.
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   3. A period of time not very long; a while; a time.
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            Thou shalt be blind, not seeing the sun for a
            season.                               --Acts xiii.
                                                  11.
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   4. That which gives relish; seasoning. [Obs.]
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            You lack the season of all natures, sleep. --Shak.
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   In season, in good time, or sufficiently early for the
      purpose.

   Out of season, beyond or out of the proper time or the
      usual or appointed time.
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