- to become or make light
- (intransitive) to shine; glow
- (intransitive) (of lightning) to flash
- (transitive)
an archaic word for enlighten
WordReference Random House Learner's Dictionary of American English © 2026
light•en1 /ˈlaɪtən/USA pronunciation
v.
light•en2 /ˈlaɪtən/USA pronunciation v.
WordReference Random House Unabridged Dictionary of American English © 2026- to (cause to) become lighter or less dark;
brighten: [no object]The sky lightened at dawn.[~ + object]The sun lightened her hair.
light•en2 /ˈlaɪtən/USA pronunciation v.
- to make lighter in weight:[~ + object]They lightened the sinking lifeboat by throwing off extra weight.
- to (cause to) become less of a burden: [~ + object]to lighten taxes.[no object]Our responsibilities have begun to lighten somewhat.
- to (cause to) become cheery or glad: [~ + object]Such news lightens my heart.[no object]His heart lightened at the thought.
- lighten up, to (cause to) become less serious or earnest: [no object]needs to lighten up.[~ + object + up]Only she can lighten him up.
light•en1
(līt′n),USA pronunciation v.i.
v.t.
light′en•er, n.
light•en2 (līt′n),USA pronunciation v.t.
v.i.
- to become lighter or less dark;
brighten:The sky lightened after the storm. - to brighten or light up, as the eyes or features:Her face lightened when she heard the good news.
- to flash as or like lightning (often used impersonally with it as subject):It thundered and lightened for hours.
- [Archaic.]to shine, gleam, or be bright:steel blades lightening in the sun.
v.t.
- to give light to;
illuminate:A full moon lightened the road. - to brighten (the eyes, features, etc.):A large smile lightened his face.
- to make lighter or less dark:Add white to lighten the paint.
- [Obs.]enlighten.
- [Obs.]to flash or emit like lightning (usually fol. by out, forth, or down):eyes that lightened forth implacable hatred.
- 1300–50; Middle English lightnen; see light1, -en1
light•en2 (līt′n),USA pronunciation v.t.
- to make lighter in weight:to lighten the load on a truck.
- to lessen the load of or upon:to lighten a cargo ship.
- to make less burdensome or oppressive;
alleviate;
mitigate:to lighten taxes; to lighten someone's cares. - to cheer or gladden:Such news lightens my heart.
v.i.
- to become less severe, stringent, or harsh;
ease up:Border inspections have lightened recently. - to become less heavy, cumbersome, burdensome, oppressive, etc.:His worries seem to have lightened somewhat.
- to become less gloomy;
perk up:People's spirits usually lighten when spring arrives.
- 1350–1400; Middle English lightnen; see light2, -en1
- 3. ease, lessen, reduce.
- 3. aggravate.
Collins Concise English Dictionary © HarperCollins Publishers::
lighten /ˈlaɪtən/ vb
lighten /ˈlaɪtən/ vb
- to make or become less heavy
- to make or become less burdensome or oppressive; mitigate
- to make or become more cheerful or lively
'lightened' also found in these entries (note: many are not synonyms or translations):