What does chaere mean in Latin?

chaere, a interjection, means “hail!, hello!”.

How do you pronounce chaere?

In classical Latin, [ˈkʰae̯.rɛ]; in ecclesiastical (church) Latin, [ˈkɛː.re].

interjection

Classical[ˈkʰae̯.rɛ]Ecclesiastical[ˈkɛː.re]

poeticrarehail!, hello!
Graecum te, Albuci, quam Romanum atque Sabinum, maluisti dici. Graece ergo praetor Athenis, id quod maluisti, te, cum ad me accedis, saluto: chaere, inquam, Tite! lictores, turma omnis chorusque: chaere Tite. Hinc hostis mi Albucius, hinc inimicus.You'd rather be called a Greek, Albucius, than a Roman and a Sabine. So, as a praetor in Athens (just what you wanted), When you approach me, I greet you as you wish: "Hello, Titus!" I say in Greek. The lictors, troops, and the whole entourage echo: "Hello, Titus!", and from this point on, Albucius is my enemy, my foe.c. 119 BC, Lucilius, Fragments, II.87,90-93:

chaere, interj., = χαῖρε,

Borrowed from Ancient Greek χαῖρε (khaîre).