I. ˈlüm noun
Etymology: Middle English lome tool, loom, from Old English gelōma tool; akin to Middle Dutch al lame tool
Date: 15th century
: a frame or machine for interlacing at right angles two or more sets of threads or yarns to form a cloth
II. intransitive verb
Etymology: origin unknown
Date: circa 1541
1. : to come into sight in enlarged or distorted and indistinct form often as a result of atmospheric conditions
2.
a. : to appear in an impressively great or exaggerated form
deficits loom ed large
b. : to take shape as an impending occurrence
III. noun
Date: 1836
: the indistinct and exaggerated appearance of something seen on the horizon or through fog or darkness ; also : a looming shadow or reflection