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Webster 1913 Edition
Rat
Rat
,Verb.
I.
[
imp. & p. p.
Ratted
; p. pr. & vb. n.
Ratting
.] 1.
In English politics, to desert one’s party from interested motives; to forsake one's associates for one's own advantage; in the trades, to work for less wages, or on other conditions, than those established by a trades union.
Coleridge . . . incurred the reproach of having
ratted
, solely by his inability to follow the friends of his early days. De Quincey.
2.
To catch or kill rats.
Webster 1828 Edition
Rat
RAT
,Noun.
A small quadruped of the genus Mus, which infests houses, stores and ships; a troublesome race of animals.
To smell a rat, to be suspicious, to be on the watch from suspicion; as a cat by the scent or noise of a rat.