Definition of slenderize in US English:

slenderize

(British slenderise)

verb

[with object]usually as adjective slenderizing
  • 1Make (a person or a part of their body) appear more slender.

    ‘my mother has always held that dark colors are slenderizing’
    • ‘Add slenderizing vertical lines to your hair through well placed highlights or lowlights.’
    • ‘The goal with a round face is to provide a style that slenderizes.’
    • ‘Choose skirt styles with slenderizing, lengthwise details - a side-front seam for example.’
    • ‘The six characters are being projected 700 years into the future, given superpowers, and outfitted in tight-fitting, slenderizing space gear.’
    • ‘Pendant earrings have a slenderising effect on full, round faces and they also soften the hard lines of an upswept hairstyle, as do very large earclips.’
    • ‘We seem to accept the fact that in athletics you can wear something that's tight fitting and slenderizing, and efficient for movement.’
    1. 1.1no object (of a person) lose weight; become slim.
      • ‘I hope that he is slenderizing for the role of Adam.’
    2. 1.2 Reduce the size of (something)
      ‘a campaign promise that he would slenderize the executive branch’
      • ‘Consumerism promises that if we got a makeover (either regular or extreme), bought the right products, removed all hair below the eyebrows, and slenderized our problem areas then we, too, could join the ranks of the thin and happy.’
      • ‘This mocha chip frappuccino is a slenderizing 600 calories.’
      • ‘He also had his bottom front teeth ‘slenderized’ so that they wouldn't touch, promoting more decay.’’

Pronunciation

slenderize

/ˈslendəˌrīz//ˈslɛndəˌraɪz/