| Idiom | Meaning | Example | 
| at death's door | 
dying, near death, brush with death
 | 
Poor Sarah! She has lung cancer and I fear she's at death's door.
 | 
| at ease | 
stand at ease, do not stand at attention, relax
 | 
The lieutenant said, "At ease, soldier. We're not on duty."
 | 
| at face value | 
the value shown by the surface, what you see ...
 | 
At face value, this car appears to be in good condition.
 | 
| at fault | 
caused the problem, to blame
 | 
The judge will decide who's at fault - who caused the crash.
 | 
| at first glance | 
when you first see it, when you notice it
 | 
At first glance, it looked like a cat - a large cat.
 | 
| at first light | 
just before the sun rises, at the crack of dawn
 | 
At first light, the ducks would fly to the grainfields to feed.
 | 
| at heart | 
with feeling for you, with you in mind
 | 
Believe me, she has your needs at heart. She cares about you.
 | 
| at it again | 
doing it again, back at it
 | 
That dog is at it again - barking in the middle of the night.
 | 
| at least | 
not very much, very little to ask
 | 
At least he could have phoned. He could have done that.
 | 
| at liberty | 
free to speak or act, allowed to speak
 | 
Are you at liberty to tell us who won? Can you tell us?
 |