What does "fish tank" mean?

A container, usually made out of glass or acrylic, specifically designed for holding water and marine life.

Fish tank

Common synonyms include: aquarium, aquariums, aquariuses, aquatic habitat, freshwater aquarium, marine museum.

noun, slang

noun, slang ·Moderate ·College level

Noun

1
A container, usually made out of glass or acrylic, specifically designed for holding water and marine life.
"I sprinkled little flakes into the fish tank for the guppies to eat."
2
a tank or pool or bowl filled with water for keeping live fish and underwater animals wordnet
3
A section of a prison for newly arrived inmates. slang

"I sprinkled little flakes into the fish tank for the guppies to eat."