Definify.com
Webster 1913 Edition
Rap
Rap
(răp)
, Noun.
 [Etymol. uncertain.] 
A lay or skein containing 120 yards of yarn. 
Knight.
 Rap
,Verb.
 I.
 [
imp. & p. p. 
Rapped 
(răpt)
; p. pr. & vb. n. 
Rapping
.] [Akin to Sw. 
rappa 
to strike, rapp 
stroke, Dan. rap
, perhaps of imitative origin.] To strike with a quick, sharp blow; to knock; 
 as, to 
. rap 
on the doorRap
,Verb.
 T.
 1. 
To strike with a quick blow; to knock on. 
With one great peal they 
rap 
the door. Prior.
2. 
(Founding) 
To free (a pattern) in a mold by light blows on the pattern, so as to facilitate its removal. 
 Rap
,Noun.
 A quick, smart blow; a knock. 
 Rap
,Verb.
 T.
 [
imp. & p. p. 
Rapped 
(răpt)
, usually written Rapt
; p. pr. & vb. n. 
Rapping
.] 1. 
To snatch away; to seize and hurry off. 
And through the Greeks and Ilians they 
The whirring chariot.
rapt
The whirring chariot.
Chapman.
From Oxford I was 
rapt 
by my nephew, Sir Edmund Bacon, to Redgrove. Sir H. Wotton.
2. 
To hasten. 
[Obs.] 
Piers Plowman.
 3. 
To seize and bear away, as the mind or thoughts; to transport out of one’s self; to affect with ecstasy or rapture; 
as, 
. rapt 
into admirationI'm 
rapt 
with joy to see my Marcia's tears. Addison.
Rapt 
into future times, the bard begun. Pope.
4. 
To exchange; to truck. 
[Obs. & Low] 
To rap and ren
, To rap and rend
[Perhaps fr. Icel. 
hrapa 
to hurry and ræna 
plunder, fr. rān 
plunder, E. ran
.] To seize and plunder; to snatch by violence. 
Dryden. 
“[Ye] waste all that ye may rape and renne.” Chaucer.
All they could 
– rap and rend 
and pilfer. Hudibras.
To rap out
, to utter with sudden violence, as an oath. 
A judge who 
 rapped out 
a great oath. Addison.
Rap
,Noun.
 [Perhaps contr. fr. 
raparee
.] A popular name for any of the tokens that passed current for a half-penny in Ireland in the early part of the eighteenth century; any coin of trifling value. 
Many counterfeits passed about under the name of 
raps
. Swift.
Tie it [her money] up so tight that you can't touch a 
rap
, save with her consent. Mrs. Alexander.
Not to care a rap
, to care nothing. 
– Not worth a rap
, worth nothing.
 Webster 1828 Edition
Rap
RAP
,Verb.
I.
  To strike with a quick sharp blow; to knock; as, to rap on the door.
RAP
,Verb.
T.
  with one great peal they rap the door.
To rap out, to utter with sudden violence; as, to rap out an oath.  [In the popular language of the United States, it is often pronounced rip, to rip out an oath; L. crepo.]
RAP
, v.t.1.
  to seize and bear away, as the mind or thoughts; to transport out of one's self; to affect with ecstasy or rapture; as rapt into admiration.I'm rapt with joy to see my Marcia's tears.
Rapt into future times the bar begun.
2.
  To snatch or hurry away.And rapt with whirling wheels.
Rapt in a chariot drawn by fiery steeds.
3.
  To seize by violence.4.
  To exchange; to truck.  [Low and not used.]To rap and rend, to seize and tear or strip; to fall on and plunder; to snatch by violence.  They brought off all they could rap and rend.  [See Rend.]
RAP
,Noun.