1. A fracture in something which does not split it open. A hairline crack is a very narrow fracture which is often barely visible with the naked eye.
2. To open something just a little.
1. A fracture in something which does not split it open. A hairline crack is a very narrow fracture which is often barely visible with the naked eye.
2. To open something just a little.
English dictionary of automotive terms. Английский словарь автомобильных терминов. 2012