[1] : The Collaborative International Dictionary of English v.0.48

halftime \half"time`\ n.
   an intermission between the first and second half of a game,
   especially a football game. also used attributively, as the
   halftime entertainment
   wordnet 1.5 +pjc half tone

[2] : WordNet (r) 2.0

half-time
     adj : involving half the standard or customary time for an
           activity; "he had two years of half-time training"
     adv : for less than the standard number of hours; "he works
           part-time" syn: part-time ant: full-time
see also:
part-time full-time 

[3] : WordNet (r) 2.0

halftime
     n : an intermission between the first and second half of a game

Half-Time >> H Words
Half-Time, definition of term: Half-Time
half-time_pag1.html