What is "rejoint"

Rejoint \Re*joint"\ (r[-e]-joint"), v. t.

1. To reunite the joints of; to joint anew.
   --Barrow.

2. Specifically (Arch.), to fill up the joints of, as stones in buildings when the mortar has been dislodged by age and the action of the weather.
   --Gwilt.

vb. 1 To reunite the joints of; to joint anew 2 (context architecture English) to fill up the joints of, as stones in buildings when the mortar has been dislodged by age and the action of the weather