fast1 S2 W3
Slow down - you're driving too fast.
a fast-moving river
Johnny ran off as fast as his legs could carry him (=running as quickly as he could).
happening in a short time:
in a short time
Kids grow up fast these days.
The survivors needed help fast.
How fast can you get the job done?
fast becoming/disappearing/approaching etc
Access to the Internet is fast becoming a necessity.
It all happened so fast I didn't even notice I was bleeding.
sleeping very deeply:
Nick was lying on the sofa, fast asleep.
to become or be firmly fixed and unable to move:
The boat was stuck fast in the mud.
She tried to pull her hand free, but it was held fast.
to not succeed in making progress or achieving something:
I kept asking her the same question, but I was getting nowhere fast.
used to tell someone not to be too eager to do or believe something:
Not so fast. We've got to prove it first, haven't we?
very close to something:
fast by the river
➔ play fast and loose with somebodyat play1 (30)
; ➔ stand fastat stand1 (25)
; ➔ thick and fastat thick2 (2)WORD FOCUS: fast
moving very quickly: at high speed, like lightning, at top speed, flat out
doing something quickly: quick, rapid, swift, prompt, speedy
happening quickly: rapid, speedy, meteoric, at an alarming rate, in no time