1a loose aggregation of small water-worn or pounded stones. a mixture of gravel with coarse sand, used for paths and roads and as an aggregate. a stratum or deposit of gravel.
2 Medicine aggregations of crystals formed in the urinary tract. 1cover (an area) with gravel: (as adjective gravelled)gravelled paths
2US informal make (someone) angry or annoyed:the strike was badly organized and it gravelled him to involve himself in it archaic confuse or puzzle (someone): the wisest doctor is gravelled by the inquisitiveness of a child