Meaning of LEAST in English

LEAST

I. ˈlēst adjective, superlative of (I) little

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

Date: before 12th century

1. : lowest in importance or position

2.

a. : smallest in size or degree

b. : being a member of a kind distinguished by diminutive size

the least bittern

c. : smallest possible : slightest

II. noun

Date: 12th century

: one that is least

- at least

III. adverb, superlative of (II) little

Date: 13th century

: in the smallest or lowest degree

- least of all

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.