NURSE

• nurse [countable]
• 1 someone whose job is to look after people who are ill or injured, usually in a hospital:
• The nurse is coming to give you an injection.
• The school nurse sent Sara home.
• a male nurse
• a senior nurse
• a student nurse (=someone who is learning to be a nurse)a psychiatric nurse (=a nurse for people who are mentally ill)
• a community nurse
• 2 old-fashioned a woman employed to look after a young child [= nanny]
• ➔ nursery nurse, wet nurse
• WORD FOCUS: hospital 
• types of hospital: medical center American English (a big hospital)
• maternity hospital (for women who are having a baby)
• mental hospital/psychiatric hospital (for people who are mentally ill)
• clinic (for people receiving a particular kind of treatment)
• hospice (for people who are dying)
• nursing home (for old people)
• parts of a hospital: A&E also casualty British English, emergency room American English, operating theatre British English/operating room American English, ward, unit
• people in a hospital: doctor, nurse, surgeon, patient, orderly
• 
  
• ➔ See also hospital

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.