Definitions:

1. A small saw with a narrow fine-toothed blade in a frame that's used to cut hard materials, like metal. NOUN
   • The plumber used a hacksaw to cut through the stubborn pipe.
2. A type of saw used for cutting various materials, typically metal or plastic. NOUN
   • The artist used a hacksaw to cut the metal frame to the desired size.
3. Saw used with one hand for cutting metal. NOUN
   • The locksmith employed a hacksaw to modify the key to fit a specific lock.

Synonyms:

• frame saw
• hacksaw
• hand saw
• metal saw