Definition from Wiktionary, the free dictionary
- Mix of sawdust, grit, etc. used to provide a soiling area for pet cats.
- (by extension, informal) Any similar mix, used to soak up liquid spills.
- (motor racing) Large area of gravel used to slow cars that leave the track.
- (mix of sawdust, etc.): cat litter
mixture to provide a soiling area for cats