noun

• (countable) A typically cold-blooded vertebrate animal that lives in water, moving with the help of fins and breathing with gills.
  "Salmon is a fish."
• (zoology) A paraphyletic grouping of the following taxonomic groups:
• (zoology) A paraphyletic grouping of the following taxonomic groups:
• (zoology) A paraphyletic grouping of the following taxonomic groups:

verb

• (intransitive, transitive) To hunt fish or other aquatic animals in a body of water, or to collect coral or pearls from the bottom of the sea.
  "We went fishing for crabs by the pier."
• (transitive) To search (a body of water) for something other than fish.
  "They fished the surrounding lakes for the dead body."
• (fishing, transitive) To use as bait when fishing.
  "`What you need are frogs,' said the veteran. `Fish them at night. There's nothing like them on big cork floats.'"
• (intransitive) To (attempt to) find or get hold of an object by searching among other objects.
  "Why are you fishing through my things?"

noun

• (obsolete) A counter, used in various games.

noun

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