- The definition of ill prepared is the state of not being equipped or ready for something.
An example of ill prepared is a person who doesn't have candles or a flashlight when the power goes out.
not properly prepared; poorly prepared
(comparative more ill-prepared, superlative most ill-prepared)
- Not well prepared. Not ready, or not in condition to do a task.
- He was ill-prepared for the exam. I'm not surprised he failed.
From ill- + prepared.