Here are some possibilities:
* If "mean" refers to average: The Greek word would be μέσος όρος (mésos óros), literally "middle term."
* If "mean" refers to unkind or cruel: Options include κακός (kakós - bad, evil), κακονόητος (kakonóētos - malevolent), σκληρός (sklirós - harsh, cruel), or μοχθηρός (mochthērós - wicked). The best choice depends on the nuance of unkindness you want to convey.
* If "mean" refers to signify or intend: This could be translated as σημαίνει (sēmainei - signifies, means) or εννοώ (ennoó - I mean, I intend).
* If "mean" refers to a low social status or a low amount: Words like φτωχός (ftōchós - poor) or μικρός (mikrós - small) might be appropriate.
To get the most accurate translation, please provide the sentence or phrase where you're using the word "mean."