buckle up
To fasten one's seat belt or safety belt.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“Please buckle up before I start the car.”
“The road ahead is very bumpy, so make sure you buckle up tightly.”
“The pilot instructed all passengers to buckle up as the aircraft prepared for a turbulent descent through the storm.”
- 01
buckle down
To apply oneself to study, or a task or work; to focus on or take a serious attitude towards something; to put forth the needed effort.
- 02
buckle to
Synonym of buckle down (“to apply oneself to study, or a task or work; to focus on or take a serious attitude towards something; to put forth the needed effort”).
Last updated August 10, 2026