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Close Off (Verb)

Stem the flow of; "shut off the gas when you leave for a vacation".

Verbs of being, having, spatial relations.

The fire department will close off the main road to contain the gas leak.
When you leave for the day, make sure to close off the valve to prevent water damage.
In case of a medical emergency, paramedics must close off the patient's wound to stop the bleeding.
The pilot will close off the fuel supply before initiating the controlled crash.
If you're going to leave your home unattended, close off the electrical circuit to avoid a short.

Isolate or separate; "She was shut off from the friends".

Verbs of walking, flying, swimming.

The doctor had to close off the affected area to prevent the infection from spreading further.
Newly installed walls were used to close off the rooms in the remodeled mansion.
Local authorities had to close off the beach after shark sightings were reported in the area.
To save on heating bills, windows on the top floor were insulated and close off from the rest of the house over winter.
After the merger, certain departments were close off from each other due to different management styles.

Block off the passage through; "We shut off the valve".

Verbs of touching, hitting, tying, digging.

The fire department had to close off the main road due to the hazardous spill.
Residents were advised to close off all windows and doors during the hurricane warning.
In emergency situations, pilots may need to close off certain sections of the aircraft to prevent further damage.
To complete the renovation, workers had to close off the floor to ensure public safety.
To avoid overflooding, engineers decided to close off the gates leading into the dam.