pin down meaning and definition

PIN DOWN verb

Definition of pin down (verb)

1. define clearly
   • "I cannot narrow down the rules for this game"
   • synonyms: nail down, narrow, narrow down, peg down, specify
2. place in a confining or embarrassing position
   • "He was trapped in a difficult situation"
   • synonyms: trap
3. attach with or as if with a pin
   • "pin up a picture"
   • synonyms: pin up