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

Gen Z versus millennials The BofA analysis found that older millennials spent the most on hobbies in the three months to August, spending more than double per consumer than Gen Z, the cohort BofA identified as spending the least. — Sawdah Bhaimiya, CNBC, 27 Sep. 2026

Evidence of a buyer’s market The cities across the country with the most and least instances of concessions as analyzed by Redfin provide even more evidence of a buyer’s market. — Sasha Rogelberg, Fortune, 26 Sep. 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

Roughly 95% of people who undergo a full-body MRI will have at least one abnormal finding, and more than 90% of those findings are harmless cysts, nodules or other changes that don’t affect overall health. — Hanna Wickes, Fort Worth Star-Telegram, 21 Sep. 2026

Research suggests about 95% of people who undergo a full-body MRI will have at least one abnormal finding. — Hanna Wickes, Miami Herald, 21 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