hammerhammer2 ●○○ verb 1[intransitive, transitive] to hit something with a hammer in order to force it into a particular position or shape: You’ll have to hammer a few nails into the frame.2[intransitive] to hit something again and again, making a lot of noise: They hammered on the door until I opened it.THESAURUShit, knock, bang, pound► see thesaurus at hit1 (1)hammer into also hammer home phrasal verb to continue repeating something until people completely understand it: The message must be hammered home that crime doesn’t pay.hammer out phrasal verb to finally agree on a solution, contract, etc. after arguing about details for a long time: It took several days to hammer out an agreement.