Definify.com

Webster 1828 Edition

adv.

Without necessity; needlessly.

unnecessarily ‎(comparative more unnecessarily, superlative most unnecessarily)

Needlessly, not necessarily
Not by necessity.
He unnecessarily repeated too much of what others had covered.
To an extent beyond what is needed.
The food provided was unnecessarily generous, especially for an event meant to raise money for the hungry.

needlessly, not necessarily

redundant