Open English Wordnet
Nouns
(n)gap, cracka narrow opening“he opened the window a crack” (n)crack, cracking, snapa sudden sharp noise“the crack of a whip”,
“he heard the cracking of the ice”,
“he can hear the snap of a twig” (n)shot, cracka chance to do something“he wanted a shot at the champion” (n)cracka blemish resulting from a break without complete separation of the parts“there was a crack in the mirror” Verbs
(v)crack, check, breakbecome fractured; break or crack on the surface only“The glass cracked when it was heated” (v)crackmake a very sharp explosive sound“His gun cracked” (v)snap, crackmake a sharp sound“his fingers snapped” (v)crackhit forcefully; deal a hard blow, making a cracking noise“The teacher cracked him across the face with a ruler” (v)break through, crackpass through (a barrier)“Registrations cracked through the 30,000 mark in the county” (v)crackbreak partially but keep its integrity“The glass cracked” (v)snap, crackbreak suddenly and abruptly, as under tension“The pipe snapped” (v)crackgain unauthorized access computers with malicious intentions“she cracked my password”,
“crack a safe” (v)cracktell spontaneously“crack a joke” (v)crackcause to become cracked“heat and light cracked the back of the leather chair” (v)crackreduce (petroleum) to a simpler compound by cracking (v)crackbreak into simpler molecules by means of heat“The petroleum cracked” Adjectives
(s)ace, A-one, crack, first-rate, super, tiptop, topnotch, top-notch, topsof the highest quality“an ace reporter”,
“a crack shot”,
“a first-rate golfer”,
“a super party”,
“played top-notch tennis”,
“an athlete in tiptop condition”,
“she is absolutely tops”