1. to adjust or become adjusted to a new climate or environment
Usage: British spelling; American English uses 'acclimate'; transitive or intransitive
2. to become familiar or comfortable with new conditions, circumstances, or surroundings
Usage: figurative use

Examples

• It took several weeks for the athletes to acclimatise to the high altitude.
• The plants will acclimatise better if you gradually expose them to sunlight.
• New employees need time to acclimatise to the company culture.
• She acclimatised quickly to living in a tropical country.
• The team acclimatised themselves to the cold weather before the competition.
• Young children can acclimatise to new schools faster than expected.