| as well | | | |
| as yet | | | |
| as you go | | | |
| as you know | | | |
| at a canter | | | |
| at a distance | | | |
| at a draught | | | |
| at a glance | | | |
| at all | | | |
| at all events | | | |
| at all hands | | | |
| at all hours | | | |
| at a loss | | | |
| at a loss for words | | | |
| at a low ebb | | | |
| at a moment's notice | | | |
| at any given moment | | | |
| at a pinch | | | |
| at arm's length | | | |
| at a stand | | | |
| at bay | | | |
| at bottom | | | |
| at cross-purposes | | | |
| at daggers drawn | | | |
| at death's door | | | |
| at each other's throats | | | |
| at first | | | |
| at first blush | | | |
| at full tilt | | | |
| at home | | | |
| at large | | | |
| at last | | | |
| at latter Lammas | | | |
| at long last | | | |
| at loose ends | | | |
| at odds | | | |
| atomic cocktail | | | |
| at one's feet | | | |
| at one's fingertips | | | |
| at pains | | | |
| at peace | | | |
| at peace with | | | |
| at places | | | |
| at rack and manger | | | |
| at rest | | | |
| at sea | | | |
| at sixes and sevens | | | |
| at someone's disposal | | | |
| at someone's door | | | |
| at someone's heels | | | |
| at spearpoint | | | |
| at stake | | | |
| attaboy | | | |
| attagal | | | |
| atta girl | | | |
| attagirl | | | |
| attakid | | | |
| attention whore | | | |
| at that | | | |
| at the best of times | | | |
| at the coal face | | | |
| at the disposal of | | | |
| at the door of | | | |
| at the drop of a hat | | | |
| at the elbow | | | |
| at the end of one's tether | | | |
| at the end of the day | | | |
| at the expense of | | | |
| at the feet of | | | |
| at the helm | | | |
| at the high port | | | |
| at the last minute | | | |
| at the mercy of | | | |
| at the ready | | | |
| at the receiving end | | | |
| at the top of one's lungs | | | |
| at the top of one's voice | | | |
| at the very least | | | |
| at the very most | | | |
| at the wheel | | | |
| at this point in time | | | |
| Attic salt | | | |
| at times | | | |
| at variance | | | |
| at will | | | |
| Augean stables | | | |
| auld lang syne | | | |
| autem cackler | | | |
| autem diver | | | |
| autem mort | | | |
| autumn romance | | | |
| avant la lettre | | | |
| average bear | | | |
| average joe | | | |
| average up | | | |
| away game | | | |
| away with the fairies | | | |
| a week from next Tuesday | | | |
| a week is a long time in politics | | | |
| a wild goose never laid a tame egg | | | |