This is the 3743rd most frequent Polish word.
maj
"Maj" means "May," the fifth month of the year.
In this sentence, 'maj' is used as the name of the month, May, to indicate a specific time period in the year.
W maju kwitną najpiękniejsze kwiaty.
In May, the most beautiful flowers bloom.
Here, 'mają' is the third-person plural form of the verb 'mieć' (to have), meaning 'they have'.
Mają długie nogi, dlatego szybko biegają.
They have long legs, so they run fast.
In this context, 'maj' is used metaphorically, perhaps representing youth, freshness, or a new beginning as depicted in poetic or lyrical language.