ˈtrial balˌloon BrE AmE noun [countable]
something that you do or say in order to see whether other people will accept something or not:
Senator Lott is floating trial balloons to test public opinion on the bill.
ˈtrial balˌloon BrE AmE noun [countable]
something that you do or say in order to see whether other people will accept something or not:
Senator Lott is floating trial balloons to test public opinion on the bill.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012