long-term relationship
nounUK /ˌlɒŋ tɜːm rɪˈleɪʃənʃɪp/
US /ˌlɔːŋ tɝːm rɪˈleɪʃənʃɪp/
A close friendship or love between people that lasts for a very long time.
My grandparents have had a long-term relationship for over fifty years.
RELATED WORDS
OTHER MEANINGS
2. A business connection between companies that continues over many years.
The two firms built a long-term relationship based on trust.
3. A steady connection between a person and a place, group, or habit that lasts a long time.
She has a long-term relationship with her local library.
4. In science, a lasting link between two things that affect each other over time.
Scientists studied the long-term relationship between diet and health.