\Un`con*form"i*ty\, n.
1. Want of conformity; incongruity; inconsistency. --South.

2. (Geol.) Want of parallelism between strata in contact.

Note: 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.