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partition (something) off
To separate and isolate a portion or section of a larger space or body by erecting a barrier of some sort around it or between them. Sometimes used figuratively. I finally partitioned my office space off with a proper wall and door to help keep it separate from the rest of the house. We've partitioned off our real estate ventures from the rest of our business because of the volatility of the market recently. I partitioned off a second hard drive on the computer to keep sensitive information secure from hackers.
partition something off
to divide off a section of something. They planned to partition the basement off. We will partition off a larger area.
To divide or separate something by or as if by means of a partition: The construction workers partitioned off each office with drywall. My vacation was almost ruined when my wallet was stolen, but I've partitioned that event off from my memories of the trip.