Having no apparent external cause or influence; occurring or produced by its own energy, force, etc. or through internal causes; self-acting
Not done on purpose
The definition of haphazard is something disorganized or without any particular order to it.
Not intended; unintentional:
(Music) Using or consisting of sounds to be chosen by the performer or left to chance; indeterminate:
Occurring without warning; unforeseen.
Without preparation or advance thought; offhand
Marked by a lack of care, accuracy, or organization; random.
The definition of fortuitous is happening by chance.
The definition of chance is accidental or not expected or planned.
Presented between major radio or television programs:
Due to oversight; unintentional
Find another word for unplanned. In this page you can discover 25 synonyms, antonyms, idiomatic expressions, and related words for unplanned, like: spontaneous, unintentional, haphazard, unwitting, unscheduled, unanticipated, aleatory, unintended, unforeseen, unexpected and planned.