The Collaborative International Dictionary
Countersigning
Countersign \Coun`ter*sign"\ (-s?n`; 277), v. t. [imp. & p. p. Countersigned (-s?nd`); p. pr. & vb. n. Countersigning.] 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.
Wiktionary
countersigning
vb. (present participle of countersign English)
Usage examples of "countersigning".
Back came whole Himalayas of completed lists for checking, recopying, rechecking, review and countersigning once again.