Luck is chance or happenstance. If something happens from pure good luck, it seemingly came out of nowhere, based only on fate and not on anything you did to make it happen.

If you find a fifty dollar bill on the sidewalk, you might exclaim, "What luck!" Alternately, if you lose all night at the poker table, you'll probably blame it on bad luck. In both examples, you're referring to a mysterious, unpredictable circumstance that affects your life by chance. Luck has a Middle Dutch root, luc, which is a shortened form of gheluc, "happiness or good fortune."

Definitions of luck

n an unknown and unpredictable phenomenon that causes an event to result one way rather than another

“bad luck caused his downfall”
chance, fortune, hazard
bad luck, mischance, mishap
an unpredictable outcome that is unfortunate
even chance, toss-up, tossup
an unpredictable phenomenon
Type of:
any state or process known through the senses rather than by intuition or reasoning

n an unknown and unpredictable phenomenon that leads to a favorable outcome

“it was my good luck to be there”
“they say luck is a lady”
fluke, good fortune, good luck
a stroke of luck
good luck in making unexpected and fortunate discoveries
Type of:
any state or process known through the senses rather than by intuition or reasoning

n your overall circumstances or condition in life (including everything that happens to you)

“the luck of the Irish”
circumstances, destiny, fate, fortune, lot, portion
show 14 types...
hide 14 types...
good fortune, good luck, luckiness
an auspicious state resulting from favorable outcomes
a manifestation of God's foresightful care for his creatures
bad luck, ill luck, misfortune, tough luck
an unfortunate state resulting from unfavorable outcomes
lack of success
prosperity, successfulness
the condition of prospering; having good fortune
blessing, boon
a desirable state
the condition of being financially weak
adversity, hard knocks, hardship
a state of misfortune or affliction
gutter, sewer, toilet
misfortune resulting in lost effort or money
hard cheese
bad luck
a state of complete lack of some abstract property
bank failure
the inability of a bank to meet its credit obligations
crop failure
the failure of crops to produce a marketable surplus
dead duck
something doomed to failure
Type of:
a mode of being or form of existence of a person or thing

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, can put you on the path to systematic vocabulary improvement.