1. the act of kissing and embracing romantically
Usage: informal
2. a narrow part or constriction of something
Usage: technical

1. present participle of neck: to kiss and embrace romantically
Usage: informal

Examples

• The teenagers were necking in the back row of the movie theater.
• The bottle showed clear necking where the glass had been heated.
• The metal rod displayed necking before it finally broke under stress.
• They spent the evening necking on the porch swing.
• The engineer measured the necking in the test specimen.
• Young couples were necking at the school dance.