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Webster 1913 Edition
Thrum
Thrum
(thrŭm)
, Noun.
 [OE. 
thrum
, throm
; akin to OD. drom
, D. dreum
, G. trumm
, lump, end, fragment, OHG. drum 
end, Icel. þrömr 
edge, brim, and L. terminus 
a limit, term. Cf. Term
.] [Written also 
thrumb
.] 1. 
One of the ends of weaver’s threads; hence, any soft, short threads or tufts resembling these. 
2. 
Any coarse yarn; an unraveled strand of rope. 
3. 
(Bot.) 
A threadlike part of a flower; a stamen. 
4. 
(Mining) 
A shove out of place; a small displacement or fault along a seam. 
5. 
(Naut.) 
A mat made of canvas and tufts of yarn. 
Thrum cap
, a knitted cap. 
Halliwell. 
– Thrum hat
, a hat made of coarse woolen cloth. 
Minsheu.
 Thrum
,Verb.
 T.
 [
imp. & p. p. 
Thrummed
; p. pr. & vb. n. 
Thrumming
.] 1. 
To furnish with thrums; to insert tufts in; to fringe. 
Are we born to 
thrum 
caps or pick straw? Quarles.
2. 
(Naut.) 
To insert short pieces of rope-yarn or spun yarn in; 
as, to 
. thrum 
a piece of canvas, or a mat, thus making a rough or tufted surfaceTotten.
 Thrum
,Verb.
 I.
 [CF. Icel. 
[GREEK]ruma 
to rattle, to thunder, and E. drum
.] 1. 
To play rudely or monotonously on a stringed instrument with the fingers; to strum. 
2. 
Hence, to make a monotonous drumming noise; 
 as, to 
. thrum 
on a tableThrum
,Verb.
 T.
 1. 
To play, as a stringed instrument, in a rude or monotonous manner. 
2. 
Hence, to drum on; to strike in a monotonous manner; to thrum the table. 
Webster 1828 Edition
Thrum
THRUM
,Noun.
  1.
  Any coarse yarn.2.
  Thrums, among gardeners, the thread-like internal bushy parts of flowers; the stamens.THRUM
,Verb.
I.
  THRUM
,Verb.
T.
  1.
  Among seamen, to insert short pieces of rope-yard or spun yard in a sail or mat.