adjective

fortuitous

for-TOO-ih-tus/fɔːrˈtuːɪtəs/

Happening by chance rather than by design.

Her discovery of the banknote while tying her shoe is fortuitous.

While kneeling to tie an undone shoelace, a woman unexpectedly notices a banknote beside her shoe.
Etymology

Latin fortuitus describes something happening by chance rather than design. Chance is the inherited idea; the lucky implication in the selected sense adds a favorable outcome.

In context

National Human Genome Research Institute59:46
And it was fortuitous that the Wellcome Trust were having one of their regular meetings on the Wednesday of the following week when we were looking at budgets.
20 Years After the Human Genome Project: G5 Leaders Reunite

More examples

  • Their discovery was fortuitous rather than planned.
  • The timing is a fortuitous coincidence.
  • A fortuitous change in the weather saves the outdoor event.

Forms

fortuitous

Similar words

accidental
Can suggest an unintended mishap rather than a lucky coincidence.
coincidental
Coincidental stresses chance conjunction; fortuitous more broadly means unplanned and often fortunate.