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To partition something or a portion of something with a section or other barrier to make it private or obscure it from view. A noun or pronoun can be used between "section" and "off." To save money, Chris moved into the living room and sectioned off a space for his bed with an old bedsheet tacked up to the walls and ceiling. They've had to section the movie set off with a giant makeshift fence so that onlookers don't learn any secrets about the film.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
To separate or divide some area: A bookcase sectioned off the sitting area from the dining area. The apartment had no rooms, so we sectioned it off with screens.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.