I. ˈlüˌpōl, -üpˌhōl noun
Etymology: loop (I) + hole
1.
a. : a small opening (as in a wall or parapet) through which small arms may be discharged
its attic was a fort, with loopholes instead of windows — American Guide Series: Texas
b. : a similar opening to admit light and air or to permit observation
2. : an outlet or means of escape ; especially : one constituted by an ambiguity or an omission in the text through which the intent of a statute, contract, or obligation may be evaded
this amendment would close a loophole in the law — U.S. Code
tax loopholes which would cost the government … millions of dollars — Robert Wallace
II. transitive verb
: to make loopholes in
on the day of the fight this fort was extensively loopholed — Scribner's