en
fast
/fæst/
Definition
1
Moving or capable of moving at high speed; quick.
2
Firmly fixed or attached; secure.
3
Abstaining from all or certain foods, especially as a religious observance.
4
(Of a clock or watch) showing a time that is ahead of the correct time.
Examples
The sloth tried to run a marathon, but everyone else lapped it because they were just too fast.
She's holding fast to her New Year's resolution, even as the donuts whisper temptations from the kitchen.
My grandfather's ancient clock is always fast, convincing him it's bedtime by dinner.
During Lent, he went on a fast so extreme, even his shadow started losing weight.