- (transitive, intransitive, rare, possibly considered nonstandard) to become or make cool
- 1918, Fitz Gerald Broad, The Problem of Life: A Solution, page 64:
- Other points of light of much smaller magnitude we find to possess no illuminative vibration of their own, but to be merely reflecting from their surface the light they receive from the larger orbs, and we note that these lesser lights are subsidiaries or dependents of the suns or parent bodies, and are in fact planets in all degrees of advancement from boiling lava mud to the coolened solidity of spheres which generate life.
- 1967, Blackhorse Mitchell, Miracle Hill: The Story of a Navajo Boy, page 193:
- Mrs. Allen sitting at her typewriter with a speed of popping sound as if someone in the kitchen is making a popcorn. Now the coffee has coolen[ed] down, Broneco took another swallow.
- 1996, Carolyn Kremers, Place of the Pretend People: Gifts from a Yup'ik Eskimo Village:
- The girls gathered around my table, ate popcorn with chopsticks, and asked for ice cubes "to coolen" their cocoa.
- 2008, Mike Haszto, Radio Free Mickey, page 34:
- A ceiling fan was going lazily, filtering the coolened air throughout the spacious living room.