from
The Collaborative International Dictionary of English v.0.48
Sergeanty \Ser"geant*y\, n. [Cf. OF. sergentie, LL. sergentia.
See {Sergeant}.] (Eng. Law)
Tenure of lands of the crown by an honorary kind of service
not due to any lord, but to the king only. [Written also
{serjeanty}.]
[1913 Webster]
{Grand sergeanty}, a particular kind of tenure by which the
tenant was bound to do some special honorary service to
the king in person, as to carry his banner, his sword, or
the like. --Tomlins. --Cowell. --Blackstone.
{Petit sergeanty}. See under {Petit}.
[1913 Webster]