three-part form

noun
UK /ˌθriː pɑːt ˈfɔːm/
US /ˌθriː pɑːrt ˈfɔːrm/

A three-part form is something made of three separate pieces or sections.

The song uses a three-part form with a beginning, middle, and end.


OTHER MEANINGS

2. In music, a song or piece organized into three distinct sections, often labeled ABA.

The composer wrote the melody in a three-part form.

3. A document or application divided into three required sections to be completed.

Please fill out the three-part form before your appointment.

4. A physical object constructed from three connected components.

The table is a three-part form that snaps together easily.