Un`con*form"i*ty, n.
1.
Want of conformity; incongruity; inconsistency.
South.
2. Geol.
Want of parallelism between strata in contact.
⇒ With some authors unconformity is equivalent to unconformability; but it is often used more broadly, for example, to include the case when the parallelism of strata once conformable has been disturbed by faulting and the like.
© Webster 1913.