1.  nursing(n = noun.act) - the work of caring for the sick or injured or infirm;
is a kind of aid, attention, care, tending
Derived forms verb nurse₁, verb nurse₃

2.  nursing(n = noun.group) - the profession of a nurse;
is a kind of health profession
Derived form verb nurse₃

3.  nursing(n = noun.act) breast feeding - nourishing at the breast;
is a kind of infant feeding
Derived form verb nurse₅

   Supplying or taking nourishment from, or as from, the breast; as, a nursing mother; a nursing infant. [1913 Webster]

nursing, n.
1 the practice or profession of caring for the sick as a nurse.
2 (attrib.) concerned with or suitable for nursing the sick or elderly etc. (nursing home; nursing sister).

Idiom:
nursing officer a senior nurse (see senior nursing officer).

associate in nursing, bachelor of arts in nursing, nursing aide, nursing bottle, nursing care, nursing home, nursing school, school of nursing