Something lukewarm is just a teeny bit warm. Lukewarm feelings are also not very strong.

Lukewarm is a word for things that are warm, but only barely. A forgotten cup of hot coffee will get lukewarm before it eventually gets cold. It's disappointing when food at a restaurant is served lukewarm; most people like their food hot. Also, people can have lukewarm feelings and reactions. If someone asks you out to lunch and you say, "Well, I guess that would be OK," that's a lukewarm response.

Definitions of lukewarm

adj moderately warm

“he hates lukewarm coffee”
having or producing a comfortable and agreeable degree of heat or imparting or maintaining heat

adj feeling or showing little interest or enthusiasm

“gave only lukewarm support to the candidate”
half-hearted, halfhearted, tepid
not enthusiastic; lacking excitement or ardor

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