How does the ICRC define torture?
Torture consists of severe pain or suffering, whether physical or mental, inflicted for such purposes as obtaining information or a confession, exerting pressure, intimidation or humiliation.
Cruel or inhuman treatment consists of acts which cause serious mental pain or suffering, or which constitute a serious outrage upon individual dignity. Unlike torture, these acts do not need to be committed for a specific purpose.
Finally, humiliating or degrading treatment consists of acts which involve real and serious humiliation or a serious outrage upon human dignity, and whose intensity is such that any reasonable person would feel outraged.
The expression ill-treatment is not a legal term, but it covers all the above-mentioned acts.