What is the meaning of sensitise?

verb

• Cause to sense; make sensitive.
  • usage: "She sensitized me with respect to gender differences in this traditional male-dominated society"; "My tongue became sensitized to good wine"
  • synonyms: sensitize
• Make sensitive to a drug or allergen.
  • usage: "Long-term exposure to this medicine may sensitize you to the allergen"
  • synonyms: sensitize
• Make (a material) sensitive to light, often of a particular colour, by coating it with a photographic emulsion.
  • usage: "sensitize the photographic film"
  • synonyms: sensitize
• Make sensitive or aware.
  • usage: "He was not sensitized to her emotional needs"
  • synonyms: sensitize, sensify, sensibilize, sensibilise