verb (imperative) Nautical.
Examples from the Web for avast
"Avast, and belay there with a double turn, goodman host," exclaimed the Captain.The Knight of the Golden Melice|John Turvill Adams
In a few minutes the second mate came up, hallooing to us to "avast," and laughing.Ned Myers|James Fenimore Cooper
So the fairy prince looked over the back fence and said, 'Avast there,' so the boy avasted as fast as he could.What Two Children Did|Charlotte E. Chittenden
I said so unto him at after, but all I gat of my noble admiral was “Avast there!”Joyce Morrell's Harvest|Emily Sarah Holt
Get a good purchase, and none of your singsong; avast all jabber.In Clive's Command|Herbert Strang
British Dictionary definitions for avast
Word Origin for avast
Word Origin and History for avast
1680s, a nautical interjection, "hold! stop!" probably worn down from Dutch houd vast "hold fast."
AVAST. -- The order to stop, or pause, in any exercise or operation; as Avast heaving -- that is to say, desist, or stop, from drawing in the cable or hawser, by means of the capstan &c. [George Biddlecombe, "The Art of Rigging," 1848]