definition of
alter

[1] #1 alter v. [change, modify] cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue". wn

[2] #2 alter v. [change, vary] 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". wn

[3] #3 alter v. make an alteration to; "This dress needs to be altered". wn

[4] #4 alter v. [interpolate, falsify] insert words into texts, often falsifying it thereby. wn

[5] #5 alter v. [neuter, spay, castrate] remove the ovaries of; "Is your cat spayed?". wn