at least
1. as much as, or more than, a number or amount:
It will cost at least $100.
It will be £200 at the very least.
You'll have to wait at least an hour.

2. used to reduce the effect of a statement:
I've met the President - at least, he shook my hand once.
See also leastways.

3. used to emphasize that something is good in a bad situation:
It's a small house but at least there's a garden.

4. used to say that someone should give a small amount of help although they do not intend to give a lot:
Even if she didn't want to send a present, she could at least have sent a card.

[TahlilGaran] Advanced Learner's Dictionary ▲

at least
at (the very) least
1.
more exactly.
I can handle it – at least, I think I can.

The car was damaged, but at least no one was hurt.

Usage notes: often used to make a statement sound less strong
2.
whatever happens.
At least Josh tried to apologize.

At the very least, you should call to tell me that you've arrived there safely.

Usage notes: the same meaning can be also expressed by come hell or high water, come what may, either way, in any case, and in any event
3.
not less than.
At least 73,000 homes are without power in the Atlanta area.

The repair will cost $100 at the very least.

Usage notes: always used with a particular amount or measure:
At the least, the room is 30 feet long.

[TahlilGaran] English Idioms Dictionary ▲

at least
no less than
There were at least 60,000 people in the stadium.

[TahlilGaran] English Idioms Dictionary ▲

at least
adv. phr.
1. or at the least At the smallest guess; no fewer than; no less than.
You should brush your teeth at least twice a day.
At least three students are failing in mathematics.
Mr. Johnson must weigh 200 pounds at least.
Compare: ALL OF.
2. Whatever else you may say; anyhow; anyway.
It was a clumsy move, but at least it saved her from getting hit.
She broke her arm, but at least it wasn't the arm she writes with.
The Mortons had fun at their picnic yesterday
■ at least the children did
■ they played while their parents cooked the food.
He's not coming
■ at least that's what he said.
Compare: AT ANY RATE.

[TahlilGaran] English Idioms Dictionary ▲