Definify.com
Webster 1913 Edition
Nasty
Nas′ty
(nȧs′ty̆)
, Adj.
[
Com
par.
Nastier
(nȧs′tĭ-ẽr)
; sup
erl.
Nastiest
.] [For older
nasky
; cf. dial. Sw. naskug
, nasket
.] 1.
Offensively filthy; very dirty, foul, or defiled; disgusting; nauseous.
2.
Hence, loosely: Offensive; disagreeable; unpropitious; wet; drizzling;
as, a
. nasty
rain, day, sky3.
Characterized by obscenity; indecent; indelicate; gross; filthy.
Anything nasty is usually wet or damp as well as filthy or dirty, and disgusts by its stickiness or odor; but filthy and foul imply that a thing is filled or covered with offensive matter, while dirty describes it as defiled or sullied with dirt of any kind; as, filthy clothing, foul vapors, etc.
Webster 1828 Edition
Nasty
NASTY
,Adj.
1.
Disgustingly filthy; very dirty, foul or defiled; nauseous.2.
Obscene.