crack
To break something quickly and with a loud sound.
To cause something to break or split suddenly, often producing a sharp sound.
A thin line in something where it has broken.
A thin line or opening on a surface where it has broken without completely separating into pieces.
To find the answer to a hard problem or mystery.
To figure out or understand something that is difficult to solve, such as a code, mystery, or puzzle.
To hit something hard and quickly.
To strike someone or something sharply and with force, often producing a sound.
A dangerous illegal drug made from cocaine that people smoke.
An illegal, highly addictive drug made by processing cocaine into small solid pieces for smoking.
To open something only a little bit.
To open something just enough to create a narrow space or let in light or air.
- Base: crack
- Plural: crack, cracks
- Base: crack
- 3rd Person Singular: cracks
- Present Participle: cracking
- Past: cracked
crack down on
1Take strong action against something bad
To take strong action to stop something bad or illegal.
- The government is cracking down on illegal street racing.
- Police are cracking down on drug dealers.
crack open a book
1Start reading or studying again
To start reading or studying from a book after not doing it for some time.
- It's time to crack open a book and prepare for exams.
- He hasn't cracked open a book all semester.
crack up
1Suddenly laugh hard or suffer breakdown
To start laughing very hard, or sometimes, to have serious mental stress problems.
- He cracked up at the joke.
- She nearly cracked up from all the pressure.
fall through the cracks
1Be overlooked or forgotten by mistake
To be missed or forgotten by mistake in an organization or system.
- Some students fall through the cracks in large schools.
- Important details fell through the cracks during planning.
at the crack of dawn
1very, very early in the morning
Very, very early in the morning, at the moment the day first starts to get light.
- She gets up at the crack of dawn to go running.
- We had to catch a flight at the crack of dawn.
- The kids woke us up at the crack of dawn on Christmas morning.
at the crack of dawn
2Very early in the morning at first light
At sunrise, when the first light appears in the morning.
- They set off at the crack of dawn.
- I'm waking up at the crack of dawn tomorrow.