What does autumn mean in Greek?

There isn't a single, direct translation of "autumn" in Greek. However, there are several options depending on the specific nuance you're looking for:

Formal and literary:

* Φθινόπωρο (fthinóporo): This is the most common and formal word for autumn in Greek. It literally means "the time of falling (leaves)."

More informal:

* Καλοκαίρι του Αγίου Δημητρίου (kalokáiri tou Agíou Dimítriou): This phrase translates to "St. Demetrius' summer" and refers to the period after the summer solstice, traditionally associated with a warm and pleasant autumn.

* Το φθινόπωρο (to fthinóporo): This is the definite article "the" followed by "autumn" and can be used in informal contexts.

Poetic:

* Χρυσό Φθινόπωρο (chrysso fthinóporo): This phrase means "Golden Autumn" and is often used in poetry to describe the beautiful and vibrant colours of the season.

Ultimately, the best translation of "autumn" will depend on the specific context and desired tone.