Dicionário

Countersign

Webster's Dictionary 1913

Coun′ter‐sign″ (–s?n′; 277), v. t. [imp. & p. p.Countersigned (–s?nd′); 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.