apt

adjective3

1. •
   Suitable; appropriate; fit or fitted; suited.

   • a river […] apt to be forded by a lamb — 1678
2. •
   Having a habitual tendency; habitually liable or likely; disposed towards.

   • This tree, if unprotected, is apt to be stripped of its leaves by a leaf-cutting ant. — 1874
3. •
   Ready; especially fitted or qualified (to do something); quick to learn.

   • Fulfill your pleasure. Live a thousand years, / I shall not find myself so apt to die. — 1599

noun1

1. •
   Abbreviation of apartment.

   • Where our apt used to be they built a fancy condominium high-rise. Which at a lowly income none of us could ever really quite afford. — 2010

noun1

1. •
   Abbreviation of apartment.

noun7

1. •
   (US) Abbreviation of apartment, preferred by the United States Postal Service; compare Apt. and apt..
2. •
   Initialism of advanced persistent threat.

   • The FBI has linked the incident to a North Korean APT it tracks as TraderTraitor, which the agency has been monitoring since 2022 for its attacks on blockchain companies. — 2025
3. •
   (UK) Initialism of advanced passenger train.
4. •
   Initialism of arbitrage pricing theory.
5. •
   (UK) Initialism of anatomical pathology technologist.
6. •
   Initialism of automation presses tooling.
7. •
   Initialism of acyl protein thioesterase.