initials
nounUK /ɪˈnɪʃəlz/
US /ɪˈnɪʃəlz/
The first letters of your names.
Please write your initials on the top of the page.
OTHER MEANINGS
2. The first letters of a person's full name used as a short signature.
The teacher put her initials on each test paper.
3. The first letters of the words in a name or phrase.
The initials of the United States are U.S.
4. To mark something with your initials.
He initialed each page of the contract.