say it: AWL-tur
alter is a verb meaning "cause to change; make different; cause a transformation". It is pronounced /ˈɔltɚ/ — AWL-tur. It carries 5 recorded senses.
become different in some particular way, without permanently losing one's or its former characteristics or essence
“her mood changes in accordance with the weather”
“The supermarket's selection of vegetables varies according to the season”
insert words into texts, often falsifying it thereby
remove the ovaries of
“Is your cat spayed?”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for alter come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.