Simple past tense and past participle of grout.(verb)
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Use "grouted" in a sentence
"Daniella Zalcman for The Wall Street Journal Though the couple haven ' t updated the bathroom of the roughly 800-square-foot co-op, they say they re-grouted the tile, re-glazed the tub and put in a new toilet."
"She hoped to create a wall faux-roughed by decades of wear -- patches of weathered concrete plus bricks both grouted and un -, painted-over and crumbling."
"It looks gorgeous, and will look even better once it's been grouted."