Observant vs Mature - What's the difference?

As nouns the difference between observant and mature

is that observant is a member of a franciscan order that strictly observes the rules of st francis while mature is masts (of a ship).

(en adjective)

Alert and paying close attention; watchful.

The observant police officer noticed that my tax disk was out-of-date.

Diligently attentive in observing a law, custom, duty or principle; regardful; mindful.

I was normally observant of the local parking restrictions.

* Sir K. Digby

We are told how observant Alexander was of his master Aristotle.

* introspective * nonobservant * unobservant

* ----

(en-adj)

Fully developed; grown up in terms of physical appearance, behaviour or thinking; ripe.

She is quite mature for her age.

Profound; careful.

The headmaster decided to expel the boy after a mature consideration.

(obsolete) Come to, or in a state of, completed suppuration.

* (grown up) childish, immature * (profound) superficial

To become mature; to ripen.

To gain experience or wisdom with age.

(finance) To reach the date when payment is due

* mature up