|The Simple English Wiktionary has a definition for: pharmacy.|
A pharmacy is a shop where therapeutic drugs are sold. Sometimes a pharmacy is also called a drug store. The people working in a pharmacy are called pharmacists or chemists (British English). These people can recognise simple diseases and give drugs for some of them.
Certain drugs are special, because they can be addictive, or they change the way other drugs act, or they need to be taken in a special way. These drugs cannot simply be bought at a pharmacy. A prescription is necessary to get them. Medical doctors give out prescriptions, which can then be used to get the drug.
Pharmacy is also a branch of chemistry that studies the molecular structure of drugs to find better drugs.