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last (i.e. immediately preceding); previous; ex-; former
pre- (e.g. premodern)
before
「前」 has other readings with different meanings.
前回の試験は難しかった。
The last exam was difficult.
前に言いましたよね。
I told you before.
前社長に挨拶をしに行った。
I went to greet the former company president.