Adjective

(er)

Taking a long time to move or go a short distance, or to perform an action; not quick in motion; proceeding at a low speed.

* {{quote-magazine, date=2013-07-20, volume=408, issue=8845, magazine=(The Economist)

, title= The attack of the MOOCs , passage=Dotcom mania was slow in coming to higher education, but now it has the venerable industry firmly in its grip. Since the launch early last year of Udacity and Coursera, two Silicon Valley start-ups offering free education through MOOCs, massive open online courses, the ivory towers of academia have been shaken to their foundations.}}

Not happening in a short time; spread over a comparatively long time.

* (John Milton)

These changes in the heavens, though slow , produced / Like change on sea and land, sidereal blast.

* {{quote-magazine, year=2013, month=May-June, author= Charles T. Ambrose

, title= Alzheimer’s Disease , volume=101, issue=3, page=200, magazine=(American Scientist) , passage=Similar studies of rats have employed four different intracranial resorbable, slow sustained release systems—surgical foam, a thermal gel depot, a microcapsule or biodegradable polymer beads.}}

Of reduced intellectual capacity; not quick to comprehend.

Not hasty; not precipitate; lacking in promptness; acting with deliberation.

* The Bible, Prov. xiv. 29

He that is slow to wrath is of great understanding.

(of a clock or the like) Behind]] in time; indicating a time [[early, earlier than the true time.

Lacking spirit; deficient in liveliness or briskness.

(of a period of time) Not busy; lacking activity.

Adjective

(en adjective)

Heavy, massive, weighty.

* 1879 , , Archibald Malmaison , ch. 5:

[H]e saw, at the end of a shallow embrasure, a ponderous door of dark wood, braced with iron.

* Edgar B. P. Darlington, The Circus Boys on the Flying Rings , ch. 4:

The great elephant, when the cage was being placed, would, at a signal from its keeper, place its ponderous head against one side of the cage and push.

(figuratively, by extension) Serious, onerous, oppressive.

* 1781 , , Lives of the Poets , "Dryden":

It was Dryden's opinion . . . that the drama required an alternation of comick and tragick scenes; and that it is necessary to mitigate, by alleviations of merriment, the pressure of ponderous events, and the fatigue of toilsome passions.

* 1845 , , Pictures From Italy , ch. 11:

In its court-yard—worthy of the Castle of Otranto in its ponderous gloom—is a massive staircase.

* 1915 , , The Voyage Out , ch. 19:

For the time, her own body was the source of all the life in the world, which tried to burst forth here—there—and was repressed now by Mr. Bax, now by Evelyn, now by the imposition of ponderous stupidity.

Clumsy, unwieldy, or slow, especially due to weight.

* 1915 , , Little Miss Grouch , ch. 10:

Slowly, through an increasing glow that lighted land and water alike, the leviathan of the deep made her ponderous progress to the hill-encircled harbor.

* 1919 , , "Kew Gardens":

Following his steps . . . came two elderly women of the lower middle class, one stout and ponderous , the other rosy cheeked and nimble.

Dull, boring, tedious; long-winded in expression.

* 1863 , , "Cousin Phillis":

Over supper the minister did unbend a little into one or two ponderous jokes.

* 1918 , , A Daughter Of The Land , ch. 2:

[A]s certainly as any one said anything in her presence that she had occasion to repeat, she changed the wording to six-syllabled mouthfuls, delivered with ponderous circumlocution.

(rare) Characterized by or associated with pondering.

* , "Sermon Upon John III" in Works of Thomas Manton (2002 edition), ISBN 9781589603462, p. 464:

Ponderous thoughts take hold of the heart; musing maketh the fire to burn, and steady sight hath the greatest influence upon us.

* 1804 , The Literary Magazine and American Register , vol. 2, no. 7, p. 10:

The acute and ponderous mind of Dr. Johnson was not always right in its decisions.

* 1850 , Fraser's Magazine for Town and Country , vol. 41, p. 242:

They are the pleasantest of all companions, and perhaps the most affluent in correct opinions of men and things generally , although little addicted to ponderous consideration or deep research.

(obsolete) Dense.