underlined; underlining; underlines
Definition of underline
(Entry 1 of 2)
1
: to mark (something, such as a word) with a line underneath
2
: to put emphasis on : stress
3
: to show clearly or emphatically
underline
nounDefinition of underline (Entry 2 of 2)
2
: a horizontal line placed underneath something
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Time Traveler for underline
The first known use of underline was in 1721
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