Adj. | 1. | unconvincing - not convincing; "unconvincing argument"; "as unconvincing as a forced smile" incredible, unbelievable - beyond belief or understanding; "at incredible speed"; "the book's plot is simply incredible" convincing - causing one to believe the truth of something; "a convincing story"; "a convincing manner" |
2. | unconvincing - having a probability too low to inspire belief implausible - having a quality that provokes disbelief; "gave the teacher an implausible excuse" |