There are 2 definitions of thrum in English:

thrum1

Syllabification: thrum
Pronunciation: /THrəm
 
/

verb (thrums, thrumming, thrummed)

[no object]
1Make a continuous rhythmic humming sound: the boat’s huge engines thrummed in his ears
More example sentences
  • The only sounds were bugs thrumming in the grasses above and birds chirping even higher up.
  • There is the occasional bit of ambient engine thrumming, or an occasional starship flyby that uses directional effects, but these uses are infrequent and nothing to write home about.
  • Outside the dramatically beautiful Saitama stadium the coaches were waiting to leave, their engines thrumming in the darkness.
1.1 [with object] Strum (the strings of a musical instrument) in a rhythmic way.
More example sentences
  • A case in point is ‘Smelling Limes In Winter’ which begins with thrumming, dulcimer-like pluckings through which a central drone rises.
  • Stretched full upon the floor would lay the minstrel, lute in hands, thrumming gently as his voice rang out through the marble room.
  • The blind man had finished his song; he began thrumming the strings again and singing amusing ballads.

noun

[usually in singular] Back to top  
A continuous rhythmic humming sound: the steady thrum of rain on the windows
More example sentences
  • Conversations aggregate into a low thrum that sounds like oiled loafers swooshing over carpet.
  • A loud whoop was briefly transmitted from the ship before the only sound was the thrum of the thrusters as the captain throttled them back down.
  • The sounds of their talking was a steady thrum in my ears, growing louder and louder as Four's hand on my arm grew tighter and tighter.

Origin

late 16th century (as a verb): imitative.

Definition of thrum in:

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Word of the day anastrophe
Pronunciation: əˈnastrəfē
noun
the inversion of the usual order of words...

There are 2 definitions of thrum in English:

thrum2

Syllabification: thrum
Pronunciation: /
 
THrəm/

noun

1(In weaving) an unwoven end of a warp thread, or a fringe of such ends, left in the loom when the finished cloth is cut away.
More example sentences
  • The new yarn is fastened to the old thrum, the ends being united.
  • Dana made thrum-catcher bags to place by loom and collect little scraps of fiber or yarn for garnetting.
1.1Any short loose thread.
More example sentences
  • Dingfa automatic brushing machine is designed to clean the leftover thrum on fabrics

verb (thrums, thrumming, thrummed)

[with object] Back to top  
Cover or adorn (cloth or clothing) with ends of thread.
More example sentences
  • The red sash of royalty is made of net work, and thrummed with red and yellow feathers.
  • Llama and alpaca yarn is used to make these beautiful mittens which are thrummed with 100% alpaca rovings.

Origin

Old English thrum (only in tungethrum 'ligament of the tongue'): of Germanic origin; related to Dutch dreum 'thrum' and German Trumm 'endpiece'. The current sense dates from Middle English.

Derivatives

thrummer

noun
More example sentences
  • Then I called Mum for mitten support - she's a seasoned thrummer - and she said, she double dips as well with the Fleece Artist roving.

thrummy

adjective

Definition of thrum in:

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Word of the day anastrophe
Pronunciation: əˈnastrəfē
noun
the inversion of the usual order of words...