close-in

[ klohs-in ]
/ ˈkloʊsˌɪn /

adjective

near, as to a common center; adjacent, especially to a city: The city is enveloping its close-in suburbs.
occurring or provided at close quarters: Fighter planes provided daring close-in air support.

British Dictionary definitions for close in

close in
/ (kləʊz) /

verb (intr, adverb)

(of days) to become shorter with the approach of winter
(foll by on or upon) to advance (on) so as to encircle or surround

Idioms and Phrases with close in

close in

1

Surround, enclose, envelop, as in The fog closed in and we couldn't see two yards in front of us, or She felt the room was closing in. [c. 1400]

2

Also, close in on or upon. Draw in, approach, as in The police closed in on the suspect. [Early 1800s]