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1. in the actual doing of something; in reality. Our policy is to be very particular, but in practice we don't care that much. The instructions say not to set it too high. In practice I always set it as high as possible.
2. well-rehearsed; well-practiced; well-exercised. The swimmer was not in practice and almost drowned. I play the piano for a living, and I have to keep in practice.
1. actually In theory, the license fee is only $5 but, because other costs get added on, in practice it is more like $20. Opposite of: in theory
2. prepared It must have been six years since I took a girl out, and I wasn't in practice for the dating game.Opposite of: out of practice
1. Actually, in fact, especially as opposed to theoretically or in principle. For example, In practice this contraption seems to work, although no one knows how or why. [Second half of 1500s] Also see put into practice.
2. In the exercise of a particular profession, as in She's an obstetrician and has been in practice for at least ten years. [c. 1700]
3. In a state of being exercised so as to maintain one's skill, as in This trumpeter is always in practice. [Early 1600s] For an antonym, see out of practice.