Table of Contents POS
WORDNET DICTIONARY
THESAURUS

RELATED WORDS : back down bargain down batten down bear down bear down on bear down upon beat down bed down belt down blow down bog down boil down bolt down bow down bowed down break down bring down broken down brush down buckle down bunk down burn down call down calm down camp down cascade down cast down choke down chop down clamp down clamp down on climb down close down clout nail coffin nail come down come down on cool down count down crack down crack down on cut down dash down deep down die down doss down down down at the heel down easter down feather down in the mouth down pat down payment down quark down syndrome down the drain down the stairs down town down under drag down dress down dressing down drink down drop down duck down dwindle down ebb down eightpenny nail face down fall down fight down flag down flap down flump down flush down fourpenny nail freeze down garbage down get down go down go down on goose down grind down gun down hampshire down hand down handed down hands down hanging down have down hit the nail on the head hold down hoot down hose down hunker down hunkered down hunt down john l. h. down jot down jumping up and down keep down kick down kip down knock down knuckle down lay down lay down the law let down letting down lie down live down load down loaded down look down on look down upon low down mark down melt down mow down nail nail enamel nail hole nail polish nail pulling nail removal nail varnish narrow down pare down peg down pin down pipe down place down plank down play down plonk down plump down plunk down pour down press down press down on pull down push down put down quiet down rain down ram down ratchet down rattle down remain down roll down rope down round down rub down run down sag down scale down send down set down settle down shake down shoot down shout down shower down shut down simmer down sit down sit down strike sit down with sixpenny nail sleek down slick down slide down slim down slow down slowing down sluice down split down sponge down stamp down stand down stare down steady down step down stepping down strike down strip down stub nail swan's down swill down swoop down upon take down take lying down talk down tamp down tear down tearing down tenpenny nail throw down thumbs down tie down tone down toned down tooth and nail touch down track down tramp down tread down trim down tune down turn down turn thumbs down turn upside down up and down upside down vote down wash down water down watered down wear down weigh down weighed down weight down weighted down whack down whittle down wiggle nail wolf down write down written down

WORDNET DICTIONARY

Verb nail down has 3 senses

• nail down(v = verb.social) nail, peg - succeed in obtaining a position; "He nailed down a spot at Harvard"
is one way to bring home the bacon, come through, deliver the goods, succeed, win
Sample sentence:
Somebody ----s something

• nail down(v = verb.cognition) narrow, narrow down, peg down, pin down, specify - define clearly; "I cannot narrow down the rules for this game"
is one way to determine
Sample sentences:
Somebody ----s something
Somebody ----s something PP

• nail down(v = verb.change) finalise, finalize, settle - make final; put the last touches on; put into final form; "let's finalize the proposal"
is one way to end, terminate
Sample sentence:
Somebody ----s something

THESAURUS

nail down

afford proof of, ascertain, assure, balance, ballast, bring home to, certify, cinch, clear up, clinch, counterbalance, decide, demonstrate, determine, dismiss all doubt, ensure, establish, find out, firm, firm up, fix, follow, follow from, freeze, get at, have a case, hold, hold good, hold water, immobilize, insure, keep, make certain, make good, make no doubt, make no mistake, make out, make sure, make sure of, pin down, prove, prove to be, prove true, reassure, remove all doubt, retain, see that, see to it, set at rest, settle, settle the matter, show, sort out, stabilitate, stabilize, steady, stick, transfix

For further exploring for "nail down" in Webster Dictionary Online