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Webster 1913 Edition
Countersign
Counˊter-sign′
(-s?nˊ; 277)
, Verb.
T.
[
imp. & p. p.
Countersigned
(-s?ndˊ)
; p. pr. & vb. n.
Countersigning
.] [
Counter-
+ sign
: cf. F. contresigner
.] To sign on the opposite side of (an instrument or writing); hence, to sign in addition to the signature of a principal or superior, in order to attest the authenticity of a writing.
Coun′ter-signˊ
,Adj.
1.
The signature of a secretary or other officer to a writing signed by a principal or superior, to attest its authenticity.
2.
(Mil.)
A private signal, word, or phrase, which must be given in order to pass a sentry; a watchword.
Webster 1828 Edition
Countersign
COUNTERSIGN
,Verb.
T.
COUNTERSIGN
,Noun.