al·ter 
/ˈɑ:ltɚ/ verb
al·ters; al·tered; al·ter·ing /ˈɑ:ltɚ/ verb 1 : to change (something) [+ obj] ▪ Alcohol can alter a person's mood. ▪ He altered his will to leave everything to his sister. ▪ This one small event altered the course of history. [no obj] ▪ The place has altered in the 10 years since I left. 2 [+ obj] : to make a change to (a piece of clothing) so that it will fit better
▪ I'll need to have/get the dress altered before the wedding. 3 [+ obj] US : to remove the sex organs of (an animal) so that the animal is unable to reproduce
▪ They had the puppies altered [=fixed] before they were sold.
▪ I'll need to have/get the dress altered before the wedding.
▪ They had the puppies altered [=fixed] before they were sold.
— altered adjective
▪ Later, we see this character again in a slightly altered form. ▪ an altered state of consciousness
▪ Later, we see this character again in a slightly altered form. ▪ an altered state of consciousness
