fast · adv
fast (FIRMLY)
C2 in a firm or tight way
Dictionary examples:
He tried to get away, but she held him fast. (29.3)
fast asleep
C2 completely asleep
Dictionary examples:
I looked into his room but he was still fast asleep. (45.9)
fast (QUICKLY)
A2 moving or happening quickly
Dictionary examples:
The teacher speaks so fast, my pen can't keep up! (0.0)
My grandma types faster on her phone than I do! (0.0)
Time flies so fast when I'm on my phone! (0.0)
We ran as fast as we could. (27.6)
The accident was caused by people driving too fast in bad conditions. (41.0)