Definition of sickly adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈsɪkli//
    ; NAmE NAmE//ˈsɪkli//
    (sicklier, sickliest) Poor health, Taste of food, Being ill
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  1. 1often ill/sick He was a sickly child. See related entries: Poor health, Being ill
  2. 2not looking healthy and strong synonym frail She looked pale and sickly. sickly plants
  3. 3that makes you feel sick, especially because it is too sweet or full of false emotion a sickly sweet smell She gave me a sickly smile. See related entries: Taste of food
  4. 4(of colours) unpleasant to look at a sickly green colour
  5. Word Originlate Middle English: probably suggested by Old Norse sjúkligr.
See the Oxford Advanced American Dictionary entry: sickly