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verb (used with object)
  1. to unite or fuse (as pieces of metal) by hammering, compressing, or the like, especially after rendering soft or pasty by heat, and sometimes with the addition of fusible material like or unlike the pieces to be united.
  2. to bring into complete union, harmony, agreement, etc.
verb (used without object)
  1. to undergo welding; be capable of being welded: a metal that welds easily.
  1. a welded junction or joint.
  2. the act of welding or the state of being welded.

Origin of weld1

1590–1600; variant of well2 in obsolete sense “to boil, weld”
Related formsweld·a·ble, adjectiveweld·a·bil·i·ty, nounweld·er, wel·dor, nounweld·less, adjectiveun·weld·a·ble, adjectiveun·weld·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for welding


  1. Sir Frederick Aloysius. 1823–91, New Zealand statesman, born in England: prime minister of New Zealand (1864–65)


  1. (tr) to unite (pieces of metal or plastic) together, as by softening with heat and hammering or by fusion
  2. to bring or admit of being brought into close association or union
  1. a joint formed by welding
Derived Formsweldable, adjectiveweldability, nounwelder or weldor, nounweldless, adjective

Word Origin

C16: variant probably based on past participle of well ² in obsolete sense to boil, heat


wold or woald (wəʊld)

  1. a yellow dye obtained from the plant dyer's rocket
  2. another name for dyer's rocket

Word Origin

C14: from Low German; compare Middle Low German walde, waude, Dutch wouw
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for welding



plant (Resedo luteola) producing yellow dye, late 14c., from Old English *wealde, perhaps a variant of Old English wald "forest" (cf. Middle Low German walde, Middle Dutch woude). Spanish gualda, French gaude are Germanic loan-words.



"joint formed by welding," 1831, from weld (v.).



1590s, alteration of well (v.) "to boil, rise;" influenced by past participle form welled. Related: Welded; welding.

Online Etymology Dictionary, © 2010 Douglas Harper