Pronunciation: (lēst),[key] —adj.,a superl. oflittlewithlessorlesseras compar. 1. smallest in size, amount, degree, etc.; slightest: He gave the least amount of money of anyone. 2. lowest in consideration, position, or importance.
—n. 1. something that is least; the least amount, quantity, degree, etc.
2. South Midland U.S.the youngest in a family or group.
3. at least, a. at the lowest estimate or figure: The repairs will cost at least $100. b. at any rate; in any case: You didn't get a good grade, but at least you passed the course.Also,at the least. 4. not in the least, not in the smallest degree; not at all: I am not in the least concerned about the outcome of the World Series.
—adv.superl. oflittlewithlessas compar. to the smallest extent, amount, or degree: That's the least important question of all. He talks least.