| 单词 | extensions | 
| 释义 | extensionnoun  ex·ten·sion  ik-ˈsten(t)-shən  1  a    : the action of extending : state of being extended    b    : an enlargement in scope or operation  tools are extensions of human hands 2  a    : the total range over which something extends : compass    b    : denotation sense 4   3  a    : the stretching of a fractured or dislocated limb so as to restore it to its natural position    b    : an unbending movement around a joint in a limb (such as the knee or elbow) that increases the angle between the bones of the limb at the joint   compare flexion sense 4a   4   : a property whereby something occupies space   5   : an increase in length of time    specifically : an increase in time allowed under agreement or concession  6   : a program that geographically extends the educational resources of an institution by special arrangements (such as correspondence courses) to persons otherwise unable to take advantage of such resources   7  a    : a part constituting an addition    b    : a section or line segment forming an additional length    c    : an extra telephone connected to the principal line    d    : a length of natural or synthetic hair that is worn attached to one's natural hair    e    : a series of usually three or four characters following a dot at the end of the name of a computer file that specifies the file's format or purpose   8   : a mathematical set (such as a field or group) that includes a given and similar set as a subset   extensions noun1 as in prolongationsthe act of making longer the board's extension of the school year drew howls of protest Synonyms & Similar Words Relevance 
 Antonyms & Near Antonyms 
 2 as in additionsa smaller structure added to a main building the new extension will connect the house with what is now a freestanding garage Synonyms & Similar Words 
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