1. marking or signing with one’s initials
Usage: present participle of ‘initial’

1. the act of marking or signing with initials
Usage: gerund form

Examples

• She was initialing each page of the contract.
• The manager spent the morning initialing expense reports.
• After initialing the document, he passed it to his colleague.
• The initialing of official papers requires careful attention.
• He finished initialing all the forms by noon.
• The secretary was responsible for initialing the correspondence.