1
general::
Phrase(s): write something into something [and] write something in
1. to write information into something. • I wrote her telephone number into my notebook. • I wrote in her number. • I took out my notebook and wrote it in. 2. to include a specific statement or provision in a document, such as a contract or agreement. • I want you to write a stronger security clause into my contract. • I will write in a stronger clause.
McGrawhill's American Idioms And Phrasal Verbs