拡張子
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Meanings
1
file extension
Computing term for the suffix after a dot in a filename, indicating file type.
You can tell the type of file by looking at its extension.
Changing the file extension may make the file unopenable.
Usage patterns
- 〈物〉の拡張子を変更するto change a file's extension
I changed the file's extension from .txt to .doc.
- 拡張子を表示するto show file extensions
I changed the settings so that file extensions are shown for all files.
- 〈物〉の拡張子を確認するto check a file's extension
I checked the attached file's extension before opening it.