Definition of "lukewarm"

lukewarm

/ˌluːkˈwɔːm/

adjective
comparative lukewarmer or more lukewarm, superlative lukewarmest or most lukewarm
1. (temperature) Between warm and cool.
2. Unenthusiastic (about a proposal or an idea).
  Quotations
  The skipper Mr. Cooke had hired at Far Harbor was a God-fearing man with a luke warm interest in his new billet and employer, and had only been prevailed upon to take charge of the yacht after the offer of an emolument equal to half a year's sea pay of an ensign in the navy.
  1897 December (indicated as 1898), Winston Churchill, chapter X, in The Celebrity: An Episode, New York, N.Y.: The Macmillan Company; London: Macmillan & Co., Ltd.