Countersign
Defined in 5 dictionaries — Cyclopedic (1922), Ballentine's (1916), Black's (1910), Black's (1891), Anderson (1889)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
To sign what has already been signed by a superior; to authenticate by an additional signature. 40 111. 167. COUNTEZ (Law Fr. count, or reckon).
In old practice. A direction formerly given Blackstone says was given in his time, in good English, "count these." 4 Bl. Comm. 340, note (u).
Ballentine's Law Dictionary
James A. Ballentine · 1916
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A Dictionary of Law
Henry Campbell Black · 1891
‘The signature of a secretary or other subordinate officer to any wriling signed by the principal or superior to vouch for the uuthenticity of it.
A Dictionary of Law
William C. Anderson · 1889
1. To sign on the opposite side. 2. To sign in addition to another, as the superior officer, and in attestation of authenticity.5 See Sign, Countersign.