Meaning of SCHOOL in English

SCHOOL

n.

Function: noun

Etymology: Middle English scole, from Middle Dutch schole; akin to Old English scolu multitude and probably to Old English scylian to separate ― more at SKILL

Date: 15th century

: a large number of fish or aquatic animals of one kind swimming together

Merriam Webster Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.