Real Dictionary

dab
DAB is the transmission of digital stereo over conventional radio channels. DAB is an abbreviation for 'digital audio broadcasting'.
countable noun: A dab of something is a small amount of it that is put onto a surface.
variable noun: A dab is a small flat fish with rough scales.
verb: If you dab something, you touch it several times using quick, light movements. If you dab a substance onto a surface, you put it there using quick, light movements.

DAB in American English
abbreviation: Dictionary of American Biography

dab in American English 1
a light, quick stroke; tap; pat
to touch or stroke lightly and quickly
intransitive verb: to strike lightly; make a dab; pat
noun: a quick or light blow; a pat, as with the hand or something soft
transitive verb: to pat or tap gently, as with something soft or moist

dab in American English 2
any of several flounders (esp. Limanda proboscidea) of coastal waters
noun: any of several flatfishes of the genus Limanda, esp. the European flatfish, L. limanda

dab in American English 3
an expert; dab hand
adjective: expert; excellent; extraordinary
noun: a person skilled in something; an expert

DAB in British English
abbreviation for: digital audio broadcasting

dab in British English 1
noun: a small amount, esp of something soft or moist
verb: to touch lightly and quickly

dab in British English 3
noun