Douglas Harper's Etymology Dictionary
uncomparable
late 14c., "incomparable," from un- (1) "not" + comparable. Meaning "unable to be compared (to something else)" is from 1826. Related: Uncomparably.
Wiktionary
uncomparable
a. 1 Not able to be compared; not comparable. 2 (context grammar English) That cannot take the three degrees of comparison; not comparable.
WordNet
uncomparable
adj. such that comparison is impossible; unsuitable for comparison or lacking features that can be compared; "an incomparable week of rest and pleasure"; "the computer proceeds with its incomparable logic and efficiency"; "this report is incomparable with the earlier ones because of different breakdowns of the data" [syn: incomparable] [ant: comparable]