[ fahy-ner ]
/ ˈfaɪ nər /

adjective Mathematics.

of or relating to a topology or a topological space whose open sets include all the open sets of a second specified topology on the space.
Compare coarser.

Origin of finer

special use of comparative of fine1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for finer