adj.
Pronunciation: ' lük- ' wo ̇ rm
Function: adjective
Etymology: Middle English, from luke lukewarm + warm; probably akin to Old High German l ā o lukewarm ― more at LEE
Date: 14th century
1 : moderately warm : TEPID
2 : lacking conviction : HALFHEARTED <gave them only lukewarm support>
– luke · warm · ly adverb
– luke · warm · ness noun