I. ˈgrau̇t noun
Etymology: Middle English, coarse meal, from Old English grūt; akin to Old English grēot grit
Date: 1638
1.
a. : thin mortar used for filling spaces (as the joints in masonry) ; also : any of various other materials (as a mixture of cement and water or chemicals that solidify) used for a similar purpose
b. : plaster
2. : lees
II. transitive verb
Date: 1838
1. : to fill up or finish with grout
2. : to fix in place by means of grout
grout a bolt into a wall
• grout·er noun