(countable) A cold-blooded vertebrate animal that lives in water, moving with the help of fins and breathing with gills.

A period of time spent fishing. / An instance of seeking something.

(intransitive) To hunt fish or other aquatic animals in a body of water. / (transitive) To search (a body of water) for something other than fish. / (fishing, transitive) To use as bait when fishing.

(obsolete) A counter, used in various games.

(uncountable) The act of catching fish. / (uncountable, informal) The act of catching other forms of seafood, separately or together with fish.

present participle of fish

(genetics) Acronym of fluorescent in situ hybridization: a molecular cytogenetic technique used to identify whether a DNA sample has a specific sequence.

A surname.

(astronomy, astrology) Synonym of Pisces

(universal) multiple kinds of fish / (usually nonstandard or archaic) multiple individual fish