(intransitive) To get used to a new climate, or to a new situation.
acclimatize to the new regulations
It takes time to acclimatize to the thin air of high mountains.
She quickly acclimatized to her new job in a foreign country.
The soldiers had to acclimatize before starting operations in the desert.
(transitive) To make used to a new climate or one that is different from that which is natural; to inure or habituate to other circumstances; to adapt to the peculiarities of a foreign or strange climate.