'Thryfallow' definitions:

Definition of 'Thryfallow'

From: GCIDE

Thryfallow \Thry"fal`low\, v. t. [Perhaps fr. thrice + fallow. Cf. Trifallow.] To plow for the third time in summer; to trifallow. [R.] [Written also thrifallow.] --Tusser. [1913 Webster]