Definify.com
Webster 1913 Edition
Ferrule
Fer′rule
(fĕr′rĭl or fĕr′rụl; 277)
, Noun.
 [Formerly 
verrel
, F. virole
, fr. L. viriola 
little bracelet, dim. of viriae
, pl., bracelets; prob. akin to viere 
to twist, weave, and E. withe
. The spelling with f is due to confusion with L. ferrum 
iron.] [Sometimes spelled 
ferule
.] 1. 
A ring or cap of metal put round a cane, tool, handle, or other similar object, to strengthen it, or prevent splitting and wearing. 
3. 
Hence: 
(Steam Boilers) 
A bushing for expanding the end of a flue to fasten it tightly in the tube plate, or for partly filling up its mouth. 
Webster 1828 Edition
Ferrule
FER'RULE
,Noun.
  A ring of metal put round a cane or other thing to strengthen it.
Definition 2025
ferrule
ferrule
English
Noun
ferrule (plural ferrules)
-  A metal band or cap placed around a shaft to reinforce it or to prevent splitting.
-  1905, Baroness Emmuska Orczy, chapter 2, in The Ayrsham Mystery:
- The cane was undoubtedly of foreign make, for it had a solid silver ferrule at one end, which was not English hall–marked.
 
 -  1934, George Orwell, Burmese Days, Chapter 23, 
- […] having settled herself in the rickshaw, [she] poked him in the back with the ferrule of her umbrella to start him.
 
 -  1986, William Gibson, Count Zero,
- Lucas withdrew the cane. Its polished ferrule flashed in the lantern glare.
 
 
 -  
 - A bushing for securing a pipe joint.
 - A metal sleeve placed inside a gutter at the top.
 - In billiards, the plastic band attaching the tip to the cue.
 - In painting, the pinched metal band which holds the bristles of a brush to the shaft.
 - On an ice axe, the metal spike at the end of the shaft.
 
Translations
metal band or cap