verb \ˈl-tər\

: to change (something)

: to make a change to (a piece of clothing) so that it will fit better

: to remove the sex organs of (an animal) so that the animal is unable to reproduce


Full Definition of ALTER

transitive verb
:  to make different without changing into something else
:  castrate, spay
intransitive verb
:  to become different
al·ter·abil·i·ty \ˌl-t(ə-)rə-ˈbi-lə-tē\ noun
al·ter·able \ˈl-t(ə-)rə-bəl\ adjective
al·ter·ably \-blē\ adverb
al·ter·er \-tər-ər\ noun

Examples of ALTER

  1. Alcohol can alter a person's mood.
  2. He altered his will to leave everything to his sister.
  3. This one small event altered the course of history.
  4. The place has altered in the 10 years since I left.
  5. I'll need to have the dress altered before the wedding.

Origin of ALTER

Middle English, from Medieval Latin alterare, from Latin alter other (of two); akin to Latin alius other — more at else
First Known Use: 14th century

Rhymes with ALTER


transitive verb \ˈl-tər\   (Medical Dictionary)
al·teredal·ter·ing \-t(ə-)riŋ\

Medical Definition of ALTER


Next Word in the Dictionary: alteration
Previous Word in the Dictionary: alt–country
All Words Near: alter

Seen & Heard

What made you want to look up alter? Please tell us where you read or heard it (including the quote, if possible).

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More