That's

//ðəts// contraction, det

contraction, det ·Uncommon ·Advanced level

Definitions

Contraction
  1. 1
    That is. contraction

    "That's the book I've been looking for."

  2. 2
    That has. contraction

    "I've managed to find the solution to the problem that's been bugging me all day."

  3. 3
    That was. contraction
  4. 4
    That does. contraction
Determiner
  1. 1
    whose, of which (in dialects that require a human antecedent for 'whose') Northern-Ireland

    "He had in his pocket an old flick-knife that's spring was slow and temperamental."

Example

More examples

"That's the stupidest thing I've ever said."

Etymology

Etymology 1

From that + 's (contraction of words ending in s).

Etymology 2

From that + -'s (possessive marker).

More for "that's"

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.