Definition of nail down Nail down

We found 5 definitions of nail down from 2 different sources.

What does nail down mean?

Verb
nail down - succeed in obtaining a position; "He nailed down a spot at Harvard"
		nail, peg
		deliver the goods, bring home the bacon, succeed, come through, win be the successor (of); "Carter followed Ford"; "Will Charles succeed to the throne?"
nail down - make final; put the last touches on; put into final form; "let's finalize the proposal"
		finalize, finalise, settle
		end, terminate bring to an end or halt; "She ended their friendship when she found out that he had once been convicted of a crime"; "The attack on Poland terminated the relatively peaceful period after WW I"
		settle on, fixate become fixed (on); "Her eyes fixated on a point on the horizon"
nail down - define clearly; "I cannot narrow down the rules for this game"
		pin down, peg down, narrow down, narrow, specify
		determine fix conclusively or authoritatively; "set the rules"
		concretize become specific; "the idea concretized in her mind"