Adjective

(-)

Lasting or remaining active throughout the year, or all the time.

a perennial stream

(botany, of a plant) Having a life cycle of more than two years. Compare (annual), (biennial).

(figuratively) Continuing without cessation or intermission; perpetual; permanent; unceasing; never failing.

* 1790 ,

The perennial existence of bodies corporate and their fortunes are things particularly suited to a man who has long views…

(figuratively) Enduring; lasting; timeless.

His artwork has a perennial beauty.

(figuratively) Recurrent; appearing or recurring again and again.

Change is a perennial theme in politics.

Adjective

(en adjective)

Unchanged through time or space; permanent.

Consistently recurring over time; persistent.

* {{quote-magazine, date=2013-11-16, volume=409, issue=8862, magazine=(The Economist), author=Schumpeter

, title= The mindfulness business , passage=The constant pinging of electronic devices is driving many people to the end of their tether. Electronic devices not only overload the senses and invade leisure time. They feed on themselves: the more people tweet the more they are rewarded with followers and retweets.}}

Steady in purpose, action, feeling, etc.

* Sir (Philip Sidney) (1554-1586)

Both loving one fair maid, they yet remained constant friends.

* (William Shakespeare) (1564-1616)

I am constant to my purposes.

* (John Dryden) (1631-1700)

His gifts, his constant courtship, nothing gained.

Firm; solid; not fluid.

* (Robert Boyle) (1627-1691)

Ifyou mix them, you may turn these two fluid liquors into a constant body.

(obsolete) Consistent; logical.

* Shakespeare, Twelfth Night IV.ii

I am no more mad than you are: make the trial of it with any constant question.