a tool for puttying, having a broad flexible blade.
Origin of putty knife
First recorded in 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for putty knife
In addition to a hammer, we would advise the young student to take a good narrow-pointed steel chisel, and a putty-knife.