- Lacking a definite structure or organization; not formally organized or systematized.
- Not regulated or regimented: an unstructured environment.
- Psychology Having no intrinsic or objective meaning; meaningful by subjective interpretation only: unstructured inkblot tests.
(comparative more unstructured, superlative most unstructured)
- Lacking structure.
- His unstructured method of planning scared anyone who had to depend on his schedules.