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]

Moby Thesaurus II by Grady Ward, 1.0:

82 Moby Thesaurus words for "try out":
   arrange, assay, be a gas, be a hit, bill, bomb, bring to test,
   clear for action, clear the decks, confirm, cure, cut and try,
   demonstrate, deploy, dramatize, dress, essay, examine, experiment,
   fail, feature, fix, fix up, flop, get ready, give a try,
   give a tryout, have a go, headline, inspect, make a hit,
   make arrangements, make preparations, make ready, marshal,
   melodramatize, mobilize, mount, open, open a show, plan,
   play around with, practice upon, prearrange, premiere, prep,
   prepare, present, pretreat, preview, process, produce, prove,
   provide, put in shape, put on, put to trial, ready, ready up,
   research, road-test, run a sample, sample, scenarize, scrutinize,
   set the stage, settle preliminaries, shake down, stage, star,
   substantiate, succeed, tan, taste, test, theatricalize, treat,
   trim, try, try it on, validate, verify