What is the meaning of etching?

noun

• An impression made from an etched plate.
• An etched plate made with the use of acid.
• Making engraved or etched plates and printing designs from them.
  • synonyms: engraving

verb

• Make an etching of.
  • usage: "He etched her image into the surface"
  • synonyms: etch
• Cause to stand out or be clearly defined or visible.
  • usage: "a face etched with pain"; "the leafless branches etched against the sky"
  • synonyms: etch
• Carve or cut into a block used for printing or print from such a block.
  • usage: "engrave a letter"
  • synonyms: engrave, etch
• Carve or cut a design or letters into.
  • usage: "engrave the pen with the owner's name"
  • synonyms: engrave, etch
• Selectively dissolve the surface of (a semiconductor or printed circuit) with a solvent, laser, or stream of electrons.
  • synonyms: etch