| Noun | 1. | show-stopper - an act so striking or impressive that the show must be delayed until the audience quiets down Synonyms: showstopper, stopper |
| 2. | show-stopper - something that is strikingly attractive or has great popular appeal; "she has a show-stopper of a smile"; "the brilliant orange flowers against the green foliage were a showstopper" Synonyms: showstopper |