GNU Dico
From GNU Collaborative International Dictionary of English, version 0.54:
Sad (săd), a. [Compar. Sadder (sădˈdẽr); superl. Saddest.] [OE. sad sated, tired, satisfied, firm, steadfast, AS. saed satisfied, sated; akin to D. zat, OS. sad, G. satt, OHG. sat, Icel. saðr, saddr, Goth. saþs, Lith. sotus, L. sat, satis, enough, satur sated, Gr. ἄμεναι to satiate, ἄδνη enough. Cf. {Assets}, {Sate}, {Satiate}, {Satisfy}, {Satire}.]
1. Sated; satisfied; weary; tired. [Obs.]
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Yet of that art they can not waxen sad,
For unto them it is a bitter sweet.
-- Chaucer.
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2. Heavy; weighty; ponderous; close; hard. [Obs., except in a few phrases; as, “sad bread”.]
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His hand, more sad than lump of lead.
-- Spenser.
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Chalky lands are naturally cold and sad.
-- Mortimer.
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3. Dull; grave; dark; somber; -- said of colors. “Sad-colored clothes.”
Walton.
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Woad, or wade, is used by the dyers to lay the foundation of all sad colors.
-- Mortimer.
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4. Serious; grave; sober; steadfast; not light or frivolous. [Obs.] “Ripe and sad courage.”
Chaucer.
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Lady Catharine, a sad and religious woman.
Bacon.
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Which treaty was wisely handled by sad and discrete counsel of both parties.
-- Ld. Berners.
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5. Affected with grief or unhappiness; cast down with affliction; downcast; gloomy; mournful.
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First were we sad, fearing you would not come;
Now sadder, that you come so unprovided.
-- Shak.
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The angelic guards ascended, mute and sad.
-- Milton.
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6. Afflictive; calamitous; causing sorrow; as, “a sad accident; a sad misfortune”.
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7. Hence, bad; naughty; troublesome; wicked. [Colloq.] “Sad tipsy fellows, both of them.”
I. Taylor.
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☞ Sad is sometimes used in the formation of self-explaining compounds; as, “sad-colored, sad-eyed, sad-hearted, sad-looking, and the like”.
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Sad bread, heavy bread. [Scot. & Local, U.S.]
Bartlett.
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Syn. -- Sorrowful; mournful; gloomy; dejected; depressed; cheerless; downcast; sedate; serious; grave; grievous; afflictive; calamitous.
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From GNU Collaborative International Dictionary of English, version 0.54:
Sad, v. t. To make sorrowful; to sadden. [Obs.]
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How it sadded the minister's spirits!
-- H. Peters.
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From GNU Collaborative International Dictionary of English, version 0.54:
SAD (?), n. Seasonal affective disorder. [Acron.]
[PJC]