mark somebody/something ↔ off phrasal verb (see also mark)

1. to make an area separate by drawing a line around it, putting a rope around it etc:
The competitors’ arena had been marked off with cones.

2. to make a mark on a list to show that something has been done or completed Synonym : tick off, check off:
Mark off each of the names on the list as I call them out.

3. British English to make something or someone different from other things or people of a similar type Synonym : distinguish
mark somebody/something ↔ off from
Sara’s natural flair for languages marked her off from the other students.

[TahlilGaran] Dictionary of Contemporary English ▲

mark off
v. phr. Mark with lines; lay out in sections.
The field will be marked off in accordance with the special track events that will take place tomorrow.

[TahlilGaran] English Idioms Dictionary ▲