Definition of sickly adjective from the Oxford Advanced American Dictionary



    (sicklier, sickliest)
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  1. 1 often sick He was a sickly child.
  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.
  4. 4(of colors) unpleasant to look at a sickly green color
See the Oxford Advanced Learner's Dictionary entry: sickly