least Meaning, Definition & Usage

  1. noun something that is of no importance
    • it is the least I can do
    • that is the least of my concerns
  2. adjective the superlative of `little' that can be used with mass nouns and is usually preceded by `the'; a quantifier meaning smallest in amount or extent or degree
    • didn't care the least bit
    • he has the least talent of anyone
  3. adverb used to form the superlative
    to the lowest degree.
    • The garter snake is the least dangerous snake

WordNet

Least adjective
Etymology
OE. last, lest, AS. lsast, lsest, superl. of lssa less. See Less, a.
Definitions
Used as the superlative of little.
  1. Smallest, either in size or degree; shortest; lowest; most unimportant; as, the least insect; the least mercy; the least space. ✍ Least is often used with the, as if a noun.
    I am the least of the apostles. 1 Cor. xv. 9.
Least adverb
Definitions
  1. In the smallest or lowest degree; in a degree below all others; as, to reward those who least deserve it.
Least conjunction
Definitions
  1. See Lest, conj. Obs. Spenser.

Webster 1913