practising

Concise Oxford English Dictionary © 2008 Oxford University Press:
practise /ˈpraktɪs/ (US practice)

▶verb

• 1 perform (an activity) or exercise (a skill) repeatedly or regularly in order to acquire, maintain, or improve proficiency in it.

• 2 carry out or perform (an activity or custom) habitually or regularly.

• 3 be engaged in (a particular profession).

• 4 observe the teaching and rules of (a particular religion).

• 5 archaic scheme or plot for an evil purpose.

– derivatives
practised adjective,
practiser noun.

– origin ME: from OFr. practiser or med. L. practizare, alt. of practicare ‘perform, carry out’, from practica ‘practice’, from Gk praktikē, from praktikos (see practical).

usage: On the difference between practise and practice, see usage at practice.