Nursing is a healthcare profession focused on the detail-oriented care of individuals, families, and communities in attaining, maintaining, and recovering optimal health and functioning. A nurse assesses, plans, implements and evaluates care independently of medical staff (doctors), and typically provides anything from basic triage care to assistance in serious trauma care and surgery.

Modern definitions of nursing describe it as a science and an art that focuses on promoting quality of life as defined by populations, communities, families, and

Nursing comes in various forms in every culture, although the definition of the term and the practice of nursing has changed greatly over time. The former being known as a wet nurse and the latter being known as a dry nurse. In the 15th century, this developed into the idea of looking after or advising another, not necessarily meaning a woman looking after a child. Nursing has continued to develop in this latter sense, although the idea of nourishing in the broadest sense refers in modern nursing to promoting quality of life.

Prior to the foundation of modern nursing, nuns and the military often provided nursing-like services. The religious and military roots of modern nursing remain in evidence today in many countries. For example: in Britain, senior female nurses are known as ‘‘sisters''. It was during time of war that a significant development in nursing history arose when Florence Nightingale, working to improve conditions of soldiers in the Crimean War, laid the foundation stone of professional nursing with the principles summarised in the book Notes on Nursing. Other important nurses in the development of the profession include: Mary Seacole, who also worked as a nurse in the Crimea; Agnes Elizabeth Jones and Linda Richards, who established quality nursing schools in the USA and Japan, and Linda Richards who was officially America's first trained nurse, graduating in 1873 from the New England Hospital for Women and Children in Boston.

New Zealand was the first country to regulate nurses nationally, with adoption of the Nurses Registration Act on the 12th of September, 1901. Ellen Dougherty was the first registered nurse. North Carolina was the first state in the United States to pass a nursing licensure law in 1903.

Nurses have experienced difficulty with the hierarchy in medicine that has resulted in an impression that nurses primary purpose is to follow the direction of medics. This tendency is certainly not observed in Nightingale's Notes on Nursing, where the doctors are mentioned relatively infrequently and often in critical tones, particularly relating to bedside manner.

The modern era has seen the development of nursing degrees and nursing has numerous journals to broaden the knowledge base of the profession. Nurses are often in key management roles within health services and hold research posts at universities.