Merriam-Webster's Collegiate® Dictionary, 11th Edition
SCARF
I. noun (plural scarfs)
Etymology: Middle English skarf, probably from Old Norse skarfr butt end of a plank
Date: 15th century
either of the chamfered or cutaway ends that fit together to form a scarf joint, an in-line joint made by chamfering, halving, or notching two pieces to correspond and lapping them,
II. transitive verb also scarph
Date: 1627
to unite by a scarf joint, to form a scarf on,
III. noun (plural scarves or scarfs)
Etymology: probably modification of Middle French dialect (Norman) escreppe, Middle French escherpe sash, sling, from Old French, pilgrim's shoulder bag, from Medieval Latin scrippum
Date: 1555
1. a military or official sash usually indicative of rank, tippet 3, a broad band of cloth worn about the shoulders, around the neck, or over the head, runner 6b,
IV. transitive verb
Date: 1598
to wrap, cover, or adorn with or as if with a scarf, to wrap or throw on (a scarf or mantle) loosely,
V. transitive verb
Etymology: by alteration
Date: circa 1960
scoff 1 , snap 2