Elder vs Older
Elder is used only for family members — my elder brother. Older works for everything — an older car, an older brother (both correct).
The one-line answer
Elder is used only for family members — my elder brother. Older works for everything — an older car, an older brother (both correct).
elder
adjectiveolder — used only for family relationships: elder brother, elder sister
- My elder sister lives in London.
- He's the elder of the two brothers.
- She has two elder brothers.
older
adjectivemore advanced in age — the general comparative of 'old' for people and things
- My older sister lives in London. (also correct)
- This building is much older than that one.
- She looks older than she is.
Memory trick
Elder stays inside the family — think of an 'elder' at a family gathering. For everything else use older, and never say 'elder than' — only 'older than' works in comparisons.
Elder vs Older: Test yourself
Question 1 of 2My ___ brother taught me to swim.