Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • intransitive verb To make sensitive.
  • intransitive verb To make (a film or plate) sensitive to light, especially to light of a specific wavelength.
  • intransitive verb To make hypersensitive or reactive to an antigen, such as pollen, especially by a second or repeated exposure.
  • intransitive verb To become sensitive or hypersensitive.

from The Century Dictionary.

  • To render sensitive; specifically, in photography, to render capable of being acted on by actinic rays of light: as, sensitized paper, or a sensitized plate. See sensitized paper, under paper.

from the GNU version of the Collaborative International Dictionary of English.

  • transitive verb (Photog.) To render sensitive, or susceptible of being easily acted on by the actinic rays of the sun.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • verb To become increasingly aware of, in a concerned or sensitive way.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • verb make sensitive to a drug or allergen
  • verb cause to sense; make sensitive
  • verb make (a material) sensitive to light, often of a particular colour, by coating it with a photographic emulsion
  • verb make sensitive or aware

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[sensit(ive) + –ize.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From sensitive +‎ -ize.

Examples

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