a number of

A collection of persons or things; several. For example, A number of tours are available, or We've visited a number of times. This idiom often is modified by an adjective giving some idea of quantity, as in Only a small number are going. [1300s] Also see any number of.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.