A clamour, an outcry; (later more usually) a yell or shout; a shrill cry.
Early 16th century; earliest use found in Gavin Douglas (c1476–1522), poet and bishop of Dunkeld. Probably either from Scottish Gaelic iolach shout, clamour, in some forms perhaps influenced by yell.
To yell, to shout. Also with object with direct speech as object: to utter with a yell or shout.
Late 18th century; earliest use found in Robert Fergusson (1750–1774), poet. From yelloch.