Verb
1. furnish with a grate;
"a grated fireplace"2. gnaw into; make resentful or angry;
"The unjustice rankled her""his resentment festered"3. reduce to small shreds or pulverize by rubbing against a rough or sharp perforated surface;
"grate carrots and onions""grate nutmeg"4. make a grating or grinding sound by rubbing together;
"grate one's teeth in anger"5. scratch repeatedly;
"The cat scraped at the armchair"