Simple past tense and past participle of melt.(verb)
Being in a liquid state as a result of melting.(adjective)
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Use "melted" in a sentence
"His expression melted into disappointment, then brightened again."
"Then the expression melted into that of an eerie doll and he began the terrible quivering too."
"Her expression melted into a frown as she added, “The thing is, there’s no record of any command orders being received, just a scrambled subspace communiqué that Spock requested, even though the call originated from Captain Kirk’s quarters.”"