ˈklōz- verb
Etymology: close (I)
intransitive verb
1. : to gather in close all around with an oppressing or isolating effect
the suffocating heaviness of New York's summer had already closed in — Marcia Davenport
a brief bloom of fortune … before adversity closed in — Dixon Wecter
despair closed in on her
2. : to approach from various directions to close quarters especially for an attack, raid, or arrest
military intelligence agents closed in on him
3. : to grow dark ; often : to grow dark early — used of the day or the evening
the short November day was already closing in — Ellen Glasgow
transitive verb
1. : to encircle closely and isolate
2. : to enshroud to such an extent as to preclude approach or egress
scouts report target closed in
the airport is closed in
3. : to shut off the flow of (an oil well)