Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun trial_balloon

2 senses of trial balloon

Sense 1
trial balloon -- (a test of public opinion)
       => trial, trial run, test, tryout -- (trying something to find out about it; "a sample for ten days free trial"; "a trial of progesterone failed to relieve the pain")

Sense 2
trial balloon -- (a balloon sent up to test air currents)
       => balloon -- (large tough nonrigid bag filled with gas or heated air)