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1. To draw a line through or otherwise obscure a portion of text (such as a name on a list) so as to designate its removal, completion, or need to be disregarded. A noun or pronoun can be used between "cross" and "off." I crossed off all the kids that are present today. Cross off any amounts that are not accurate. Hey, cross me off—I already brought in my donation.
2. To mark or acknowledge something as completed, as on a list. A noun or pronoun can be used between "cross" and "off." I mowed the lawn today, so I can finally cross that off my to-do list. You'll finally be able to cross off hang gliding on your bucket list!
cross someone or something off (of) somethingand cross someone or something off
to eliminate a name from a list or record. (Of is usually retained before pronouns.) We will have to cross her off of our list. We crossed off Sarah. I crossed the sweater off the list of what I needed to buy.