Webster's 1828 Dictionary
CESSOR
n. 1. In law, he that neglects, for two years, to perform the service by which he holds lands, so that he incurs the danger of the writ of cessavit. [See Cessavit. ]
2. An assessor, or taxer.
Webster's 1913 Dictionary
CESSOR
Ces "sor, n. Etym: [From Cess, v. i. Cf. Cesser. ] (Law )
Defn: One who neglects, for two years, to perform the service by which he holds lands, so that he incurs the danger of the writ of cessavit. See Cessavit. Cowell.
CESSOR
Ces "sor, n. Etym: [From Cess, v. t.]
Defn: An assessor. [Obs. ]