Used other than as an idiom: see ice, cube.(noun)
Any small piece of ice used for cooling drinks, larger than crushed ice, regardless of their shape.(noun)
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Use "ice cube" in a sentence
"Pour half-and-half and prepared, cooled Teeccino into ice cube trays and freeze solid."
"Franta clapped his hands together and theatrically dropped a single ice cube in a lowball glass."
"Juicy ice cubes: Or freeze 100% juice in fun-shaped ice cube trays hearts, stars, fish and float them in glasses filled with naturally flavored seltzer, says New York dietitian Joy Bauer."