1. alter - Noun
2. alter - Verb
To make otherwise; to change in some respect, either partially or wholly; to vary; to modify.
To agitate; to affect mentally.
To geld.
To become, in some respects, different; to vary; to change; as, the weather alters almost daily; rocks or minerals alter by exposure.
Source: Webster's dictionaryIs your cat spayed? Source: Internet
her mood changes in accordance with the weather Source: Internet
The supermarket's selection of vegetables varies according to the season Source: Internet
The advent of the automobile may have altered the growth pattern of the city Source: Internet
The discussion has changed my thinking about the issue Source: Internet
This dress needs to be altered Source: Internet