nail_down
1. [ verb ] succeed in obtaining a position
Synonyms: peg nail
Examples:

"He nailed down a spot at Harvard"

Related terms: succeed
2. [ verb ] define clearly
Synonyms: pin_down narrow_down narrow specify peg_down
Examples:

"I cannot narrow down the rules for this game"

Related terms: determine concretize specifier
3. [ verb ] make final; put the last touches on; put into final form
Synonyms: settle finalise finalize
Examples:

"let's finalize the proposal"

Related terms: end end fixate