define append.
To append means to add on, usually to the end of something. You might want to append a clause onto a contract if you feel something has been left unsaid in it. Youâve probably seen the word append before, at least as part of another word: appendix. An appendix is a final section appended onto a book that offers additional information or notes. You can also use append to mean to fix onto or to attach usually at the end.