a Gestalt principle of organization holding that (other things being equal) parts of a stimulus field that are similar to each other tend to be perceived as belonging together as a unit
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"
the act of reconnoitring (especially to gain information about an enemy or potential enemy); "an exchange of fire occurred on a reconnaissance mission"