least

1 of 3

adjective

ˈlēst 

superlative of little entry 1

1

: lowest in importance or position

It's least on my list of worries.

2

a

: smallest in size or degree

The least noise would startle her.

b

: being a member of a kind distinguished by diminutive size

the least bittern

c

: smallest possible : slightest

… believed that the least government was the best government …

—Irving Stone

least

2 of 3

noun

: one that is least

see also:

at least

least

3 of 3

adverb

superlative of little entry 2

: in the smallest or lowest degree

see also:

least of all

Examples of least in a Sentence

Adverb

Who was the least at fault in the case?

He asked me to help him when I least expected it.

That was the least important of her reasons.

That was the least interesting book I have ever read.

Recent Examples on the Web

Adjective

In sports, there are always players who burst onto the scene when everyone least expects it. — Alejandro Hernandez, Miami Herald, 3 Oct. 2026

People in crisis have the least power to refuse a technology, contest its errors, or walk away from it. — Jeannie Annan, Fortune, 2 Oct. 2026

Noun

The scales will be tipped by those least connected to the political parties, and most connected to deliberative process. — David Paleologos, USA TODAY, 29 Oct. 2019

Respondents were asked to rank 39 possible trends—25 of which were trends from previous years—from 1 (least likely to be a trend) to 10 (most likely to be a trend). — Leah Prinzivalli, SELF, 1 Nov. 2018

Adverb

All had at least one straight side, and several were essentially rectangles. — Daniel Immerwahr, New Yorker, 28 Sep. 2026

After ranking among the least efficient quarterbacks in the league for much of his tenure in Cleveland, Deshaun Watson has suddenly looked competent — and the Browns are now 2-1, after a 21-18 win. — Andrew Greif, NBC news, 28 Sep. 2026

Word History

Etymology

Adjective, Noun, and Adverb

Middle English leest, from Old English lǣst, superlative of lǣssa less

First Known Use

Adjective

before the 12th century, in the meaning defined at sense 1

Noun

12th century, in the meaning defined above

Adverb

13th century, in the meaning defined above

Phrases Containing least

• at least
• at the (very) least
• last but not least
• least common denominator
• least common multiple
• least of all
• least squares
• least tern
• least weasel
• not (in) the least
• not (in) the least/smallest/slightest/tiniest bit
• not least
• take/follow the path/line of least resistance
• the least of
• the least of someone's worries
• the least someone can do
• to say the least

Rhymes for least

• beast
• ceased
• creased
• east
• feast
• fleeced
• geest
• greased
• leased
• pieced
• priest
• yeast

Kids Definition

least

1 of 3 adjective

ˈlēst 

1

: lowest in importance or position

2

: smallest in size or degree

least

2 of 3 noun

: one that is least : something of the lowest possible value or importance

least

3 of 3 adverb

: in the smallest or lowest degree

Medical Definition

least

superlative of little