Definify.com

Webster 1913 Edition

adv.

In a mature manner; with ripeness; completely.

With caution; deliberately.

Dryden.

Early; soon.

[A Latinism, little used]

Bentley.

adv.

With ripeness; completely.

With full deliberation. A prince entering on war, ought, maturely to consider the state of his finances.

Early; soon. [A Latinism, little used.]

maturely ‎(comparative more maturely, superlative most maturely)

In a mature manner.
- 2001 Sep/Oct, Jacob Azerrad, “Why our kids are out of control”, in Psychology Today, volume 34, number 5, page 42:
  When the teachers again ignored the crying and attended to Bill only when he acted maturely, the crying spells dropped sharply
Acting with maturity.
Maturely, she simply declined to participate in the ceremony.