Definify.com
Webster 1913 Edition
Sad
Sad
(săd)
, Adj.
 [
Com
par.
 Sadder 
(săd′dẽr)
; sup
erl.
 Saddest
.] 1. 
Sated; satisfied; weary; tired. 
[Obs.] 
Yet of that art they can not waxen 
For unto them it is a bitter sweet.
sad
,For unto them it is a bitter sweet.
Chaucer.
2. 
Heavy; weighty; ponderous; close; hard. 
[Obs., except in a few phrases; 
as, 
.] sad 
breadHis hand, more 
sad 
than lump of lead. Spenser.
Chalky lands are naturally cold and 
sad
. Mortimer.
3. 
Dull; grave; dark; somber; – said of colors. 
“Sad-colored clothes.” Walton.
 Woad, or wade, is used by the dyers to lay the foundation of all 
sad 
colors. Mortimer.
4. 
Serious; grave; sober; steadfast; not light or frivolous. 
[Obs.] 
“Ripe and sad courage.” Chaucer.
 Lady Catharine, a 
sad 
and religious woman. Bacon.
 Which treaty was wisely handled by 
sad 
and discrete counsel of both parties. Ld. Berners.
5. 
Affected with grief or unhappiness; cast down with affliction; downcast; gloomy; mournful. 
First were we 
Now
sad
, fearing you would not come;Now
sadder
, that you come so unprovided. Shakespeare
The angelic guards ascended, mute and 
sad
. Milton.
6. 
Afflictive; calamitous; causing sorrow; 
as, a 
. sad 
accident; a sad 
misfortune7. 
Hence, bad; naughty; troublesome; wicked. 
[Colloq.] 
“Sad tipsy fellows, both of them.” I. Taylor.
 ☞ 
Sad 
is sometimes used in the formation of self-explaining compounds; as, 
. sad
-colored, sad
-eyed, sad
-hearted, sad
-looking, and the likeSad bread
, heavy bread. 
[Scot. & Local, U.S.] 
Bartlett.
Syn. – Sorrowful; mournful; gloomy; dejected; depressed; cheerless; downcast; sedate; serious; grave; grievous; afflictive; calamitous. 
 Sad
,Verb.
 T.
 To make sorrowful; to sadden. 
[Obs.] 
How it 
sadded 
the minister’s spirits! H. Peters.
Webster 1828 Edition
Sad
SAD
,Adj.
 1.
  Sorrowful; affected with grief; cast down with affliction.Th' angelic guards ascended, mute and sad.
Sad for their loss, but joyful of our life.
2.
  Habitually melancholy; gloomy; not gay or cheerful.See in her cell sad Eloisa spread.
3.
  Downcast; gloomy; having the external appearance of sorrow; as a sad countenance.  Matt. 6.4.
  Serious; grave; not gay, light or volatile.Lady Catherine, a sad and religious woman.
5.
  Afflictive; calamitous; causing sorrow; as a sad accident; a sad misfortune.6.
  Dark colored.Woad or wade is used by the dyers to lay the foundation of all sad colors.
[This sense is, I believe, entirely obsolete.]
7.
  Bad; vexatious; as a sad husband.  [Colloquial.]8.
  Heavy; weighty; ponderous.With that his hand more sad than lump of lead.  Obs.
9.
  Close; firm; cohesive; opposed to light or friable.Chalky lands are naturally cold and sad.  Obs.
[The two latter senses indicate that the primary sense is set, fixed.]