mackerel (măkʹər-əl, măkʹrəl) noun. 1. Any of several widely distributed marine fishes of the family Scombridae, especially the Atlantic mackerel (Scomber scombrus), an important food fish having dark, wavy bars on the back and a silvery belly. 2. Any of the smaller fishes of the suborder Scombroidea, such as the Spanish mackerel, sejenis ikan kembung; spanish mackerel, sejenis ikan tenggiri.
mackerel sky (măkʹər-əl skĪ) noun. A sky covered with many small cirrocumulus or altocumulus clouds, giving an overall effect of the markings to be found on a mackerel. buttermilk sky, langit yang berawan sisik