Definition: To join two materials (especially two metals) together by applying heat, pressure and filler, either separately or in any combination.

Alright class, settle down now, let’s talk about welding, how! It’s a fascinating process, a skill you might vow. The dictionary's right, it’s quite clear, Joining materials, banishing fear! Specifically metals, that's where it starts, But let’s break down the work with careful arts. “Heat,” you see, is crucial and bright, Melting the metal, shining light! Then “pressure” applies, a steadfast hold, Keeping things steady, brave and bold. And "filler" – that's the magic key, Adding material for strong unity! It could be done alone, or combined with grace, Each element playing its essential space. So welding’s about fusing, a skillful design, Creating connections truly divine! Do you have any questions? Let’s discuss it with glee, Now who can tell me what welding means to you and me?