| 单词 | extension |
| 释义 | extension n. 1. the act or an instance of extending; the process of being extended. 2. prolongation; enlargement. 3. a part enlarging or added on to a main structure or building. 4. an additional part of anything. 5. a a subsidiary telephone on the same line as the main one. b its number. 6. a an additional period of time, esp. extending allowance for a project etc. b permission for the sale of alcoholic drinks until later than usual, granted to licensed premises on special occasions. 7. extramural instruction by a university or college (extension course). 8. extent, range. 9. Logic a group of things denoted by a term. Derivatives extensional adj. Etymology: ME f. LL extensio (as EXTEND) |
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