ISO 4378-2:2009给出了与滑动轴承摩擦和磨损相关的最常用术语及其定义和分类。对于一些术语和单词组合，给出了它们的简短形式，可以在它们不明确的地方使用。不言自明的术语没有定义。 除了英语和法语（ISO三种官方语言中的两种）中使用的术语外，ISO 4378-2:2009还提供了德语中的等效术语；这些由德国（DIN）成员机构负责发布，仅供参考。只有以官方语言给出的术语和定义才能被视为ISO术语和定义。

ISO 4378-2:2009 gives the most commonly used terms relating to friction and wear of plain bearings with their definitions and classification. For some terms and word-combinations, their short forms are given, which can be used where they are unambiguous. Self-explanatory terms are given without definitions. In addition to terms used in English and French, two of the three official ISO languages, ISO 4378-2:2009 gives the equivalent terms in German; these are published under the responsibility of the member body for German (DIN), and are given for information only. Only the terms and definitions given in the official languages can be considered as ISO terms and definitions.