1. prep. In, near, or in the general vicinity of a particular place.
Caesar was at Rome; at the corner of Fourth Street and Vine; at Jim’s house
2. prep. (indicating time) (Indicating occurrence in an instant of time or a period of time relatively short in context or from the speaker's perspective.)
at six o’clock; at closing time; at night.
3. prep. In the direction of (often in an unfocused or uncaring manner).
But you're not at all like that.
There has been a rumour that I am not at all pleased with the judges.
So if from time to time you see in me, like an abstracted stillness, melancholy still my eyes, it's I'm a woman living lonely and not at all that I'm unhappy.
She is neatly dressed not at all haggard, except for a weariness in her eyes.
This translates into thousands of patients being looked after by locums, or not at all.