mackerel sky mackerel shark • mackinac bridge · · · Info · Definitions · Characters · · mackerel sky · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) a sky filled with rows of cirrocumulus or small altocumulus clouds. Synonyms: mackerel sky. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 k latin small letter k U+006B l latin small letter l U+006C m latin small letter m U+006D r latin small letter r U+0072 s latin small letter s U+0073 y latin small letter y U+0079