mass noun
1
- the actual application or use of an idea, belief, or method as opposed to theories about such application or use实践; 实施, 实行; 应用（与理论相对）：
the principles and practice of teaching
教学原理与实践
he put his self-defence training into practice by helping police arrest the armed robber.
他用学到的防身术帮警察抓住那名持枪抢劫犯。
1.1
- the customary, habitual, or expected procedure or way of doing of something惯常做法, 惯例; 习俗：
current nursing practice
目前的护理常规
count noun modern child-rearing practices.现代育儿惯常做法。
1.2
- the carrying out or exercise of a profession, especially that of a doctor or lawyer（尤指医生、律师的）执业：
he abandoned medical practice for the Church.
他放弃从医而投身教会。
1.3
- count noun the business or premises of a doctor or lawyer（医生或律师的）业务; 经营场所：
Dr Apps has a practice in Neasham Road.
阿普斯医生在尼沙姆路开了一家诊所。
1.4
- an established method of legal procedure诉讼手续, 诉讼程序。
2
- repeated exercise in or performance of an activity or skill so as to acquire or maintain proficiency in it反复练习：
it must have taken a lot of practice to become so fluent.
一定经过了多次反复练习之后才变得如此流利。
2.1
- count noun a period of time spent doing this练习时间：
daily choir practices.
每天的合唱训练。
短语
in practice
1
- in reality (used to refer to what actually happens as opposed to what is meant or believed to happen)实际上（用来指与预期或据信已发生的事相反的实际情况）：
in theory this method is ideal - in practice it is unrealistic.
理论上这种方法很理想, ——但实际上却不现实。
1.1
- currently proficient in a particular activity or skill as a result of repeated exercise or performance of it（活动、技能因长期练习或表演而）熟练的。
out of practice
- not currently proficient in a particular activity or skill through not having exercised or performed it for some time不熟练, 生疏：
he was out of practice at interrogation.
他对审讯不太熟练。
practice makes perfect
- used to convey that regular exercise of an activity or skill is the way to become proficient in it, especially when encouraging someone to persist in it（尤用于鼓励）熟能生巧。
词源
late Middle English: from PRACTISE, on the pattern of pairs such as advise, advice.