WordWeight : Weighing the Words

Pronunciation : Coun`ter*sign" (-sn`; 277)
Part of Speech : v.
Etymology : [Counter- + sign: cf. F. contresigner.]
Definition : Defn: 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.

t. [imp. & p. p. Countersigned (- snd`); p. pr. & vb. n. Countersigning.]
Source : Webster's Unabridged Dictionary, 1913

Pronunciation : Coun"ter*sign`
Part of Speech : a.
Definition : 1. The signature of a secretary or other officer to a writing signed by a principal or superior, to attest its authenticity.

2. (Mil.)

Defn: A private signal, word, or phrase, which must be given in order to pass a sentry; a watchword.
Source : Webster's Unabridged Dictionary, 1913