Definitions of weld:

• noun:   a metal joint formed by softening with heat and fusing or hammering together
• noun:   United States abolitionist (1803-1895)
• noun:   European mignonette cultivated as a source of yellow dye; naturalized in North America
• verb:   unite closely or intimately

  Example: "Her gratitude welded her to him"

• verb:   join together by heating

  Example: "Weld metal"

• name:  A surname (very rare: popularity rank in the U.S.: #23297)