meaning of "hole up"

[karlita]

English Idioms and Expressions, Advanced Level

ESL/EFL Test #33 "American Slang Words (7)", question 8

The gang members holed up for nearly three weeks because they are wanted on three counts of armed robbery.

(a) dug a hole
(b) bought extra ammunition
(c) hid

English Idioms and Expressions, Advanced Level

ESL/EFL Test #33 "American Slang Words (7)", answer 8

The gang members hid for nearly three weeks because they are wanted on three counts of armed robbery.

Correct answer: (c) hid
_________________________

Hi could you tell me the meaning of "hole up" ? Thanks

karlita =^.^=

[Pamela]

The answer is already given in the test. Consult the Onelook for learning the precise bearing of 'hole up'