Meaning of Lindelöf space

Lin'de•löf space"

Pronunciation: (lin'du-lof", -lôf", -lœf"), [key]
— Math. Math.
  1. a topological space having the property that every cover consisting of open sets has a subcover consisting of a countable number of subsets.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.