what is studying
Definition of study for English Language Learners. : 1  the activity or process of learning about something by reading, memorizing facts, attending school, etc. : 2  an area of learning taught in a school. : 3  something that a person studies or gives attention to.
A study is an experiment when we do something to people or objects in order to monitor their response. The purpose is to see the effects of one variable on another variable. The ideal example of that is clearly a laboratory experiment.