happier; happiest
Definition of happy
1
: favored by luck or fortune : fortunate
a happy coincidence
2
: notably fitting, effective, or well adapted : felicitous
a happy choice
3a
: enjoying or characterized by well-being and contentment
is the happiest person I know a happy childhood
b
: expressing, reflecting, or suggestive of happiness
a happy ending
d
: having or marked by an atmosphere of good fellowship : friendly
a happy office
4a
: characterized by a dazed irresponsible state
a punch-happy boxer
b
: impulsively or obsessively quick to use or do something
trigger-happy
c
: enthusiastic about something to the point of obsession : obsessed
education-conscious and statistic-happy— Helen Rowen
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The Exceptions Quiz III
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- Which of these words does not mean "nonsense"?

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Merriam-Webster unabridged
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Time Traveler for happy
The first known use of happy was in the 14th century
See more words from the same century