- to boil (an egg) until the yolk and white have become firm or solid.
Origin of hard-boil
First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for hard-boil
Goodness, what would my home economics teacher have said if she had heard me say 'hard-boil'?A Thousand Ways to Please a Husband
Louise Bennett Weaver
Hard-boil some eggs and, while they are cooking, fry a large square slice of bread in butter to make a large crouton.The Belgian Cookbook
Stir constantly over a hot fire until it reaches the hard-boil stage.
Stir the mixture constantly over the fire until it reaches the hard-boil stage.
A nationality and a kingdom were at stake there, and no more time to decide it in than it takes to hard-boil an egg.Personal Recollections of Joan of Arc