From The Collaborative International Dictionary of English v.0.48:
Concession \Con*ces"sion\, n. [L. concessio, fr. concedere: cf.
F. concession. See Concede.]
1. The act of conceding or yielding; usually implying a
demand, claim, or request, and thus distinguished from
giving, which is voluntary or spontaneous.
[1913 Webster]
By mutual concession the business was adjusted.
--Hallam.
[1913 Webster]
2. A thing yielded; an acknowledgment or admission; a boon; a
grant; esp. a grant by government of a privilege or right
to do something; as, a concession to build a canal.
[1913 Webster]
This is therefore a concession, that he doth . . .
believe the Scriptures to be sufficiently plain.
--Sharp.
[1913 Webster]
When a lover becomes satisfied by small compliances
without further pursuits, then expect to find
popular assemblies content with small concessions.
--Swift.
[1913 Webster] Concessionaire