The Collaborative International Dictionary of English v.0.48:

Try out \Try out\, v. i.
   to compete for a postition, as on a sports team or in a
   theatrical presentation.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

Try out \Try out\, v. t.
   to use (something not previously used) to determine its
   fitness for a particular purpose; also, to attempt (a deed)
   to determine if it will accomplish a particular purpose.
   [PJC]

WordNet (r) 3.0 (2006):

try out
    v 1: put to the test, as for its quality, or give experimental
         use to; "This approach has been tried with good results";
         "Test this recipe" [syn: test, prove, try, try out,
         examine, essay]
    2: try something new, as in order to gain experience; "Students
       experiment sexually"; "The composer experimented with a new
       style" [syn: experiment, try out]
    3: perform in order to get a role; "She auditioned for a role on
       Broadway" [syn: audition, try out]
    4: take a sample of; "Try these new crackers"; "Sample the
       regional dishes" [syn: sample, try, try out, taste]