What is the meaning of etch?

verb

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