Also as shown in Revelations 3:15-16, as an analogy for those who don't choose how they will believe and act:

15 I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot.

16 So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.

Luke"warm` (?), a. [See Luke.]

Moderately warm; neither cold nor hot; tepid; not ardent; not zealous; cool; indifferent.

" Lukewarm blood." Spenser. " Lukewarm patriots."

Addison.

An obedience so lukewarm and languishing that it merits not the name of passion. Dryden.

-- Luce"warm`ly, adv. -- Luce"warm`ness, n.

 

© Webster 1913.