Dictionary
2 ENTRIES FOUND:

1lighten

verb light·en \ˈlī-tən\
light·enedlight·en·ing \ˈlīt-niŋ, ˈlī-tən-iŋ\

Definition of LIGHTEN

transitive verb
1
:  to make light or clear :  illuminate
2
archaic :  enlighten
3
:  to make (as a color) lighter
intransitive verb
1
a archaic :  to shine brightly
b :  to grow lighter :  brighten
2
:  to give out flashes of lightning
light·en·er \ˈlīt-nər, ˈlī-tən-ər\ noun

Origin of LIGHTEN

Middle English lightenen, from light
First Known Use: 14th century

2lighten

verb
light·enedlight·en·ing \ˈlīt-niŋ, ˈlī-tən-iŋ\

Definition of LIGHTEN

transitive verb
1
a :  to relieve of a burden in whole or in part <the news lightened his mind>
b :  to reduce in weight or quantity :  lessen
c :  to make less wearisome :  alleviate <lighten our sorrow>
2
:  cheer, gladden
intransitive verb
1
:  to become lighter or less burdensome
2
:  to become more cheerful
light·en·er \ˈlīt-nər, ˈlī-tən-ər\ noun

First Known Use of LIGHTEN

14th century

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