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laughing

[laf-ing, lah-fing] /ˈlæf ɪŋ, ˈlɑ fɪŋ/
adjective
1.
that laughs or is given to laughter:
a laughing child.
2.
uttering sounds like human laughter, as some birds.
3.
suggesting laughter by brightness, color, sound, etc.:
a laughing stream; laughing flowers.
4.
laughable:
The increase in crime is no laughing matter.
noun
5.
Origin
1250-1300
1250-1300; Middle English; see laugh, -ing1, -ing2
Related forms
laughingly, adverb
unlaughing, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Word Origin and History for un laughing

laughing

n.

mid-14c., verbal noun from laugh (v.). Laughing matter (usually with negative) is from 1560s. Nitrous oxide has been called laughing gas since 1842 (for its exhilarating effects). Davy, experimenting with the gas, discovered these as far back as 1779: "When I took the bag from my mouth, I immediately laughed. The laughter was involuntary, but highly pleasurable, accompanied by a thrill all through me."

Online Etymology Dictionary, © 2010 Douglas Harper
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