transitive verb-·ized·, -·iz·ing
- to specify the items of; set down, item by item: to itemize a bill of purchases
- to specify (the individual items in a group or list): to itemize deductions on one's tax return
verbi·tem·ized, i·tem·iz·ing, i·tem·iz·es
- To place or include on a list of items: itemized her expenses on the proper form.
- To list the items of: itemized the expense account.
To list deductions from taxable income on a tax return: This benefit is available only to taxpayers who itemize.