"Old" is the general age adjective; "elder" is used only for people in family or community relationships.
Old, aged, having existed for a long time. Used for people, animals, objects, and concepts.
My grandmother is 87 years old and still does yoga every morning.
That's an old building. It was built in 1892.
My older sister lives in Canada now.
Older (in comparison to another family member). Only for people, not things. Also: a respected community senior (noun).
My elder brother always gave me advice when I was growing up.
In many cultures, the elders of the community are deeply respected.
She is the elder of the two sisters, born three years before her sibling.
Common mistake
Using "elder" for objects or animals: "this is an elder building" is incorrect — for things use "old" or "older". "Elder" only works with people, and generally in family or community contexts. Also: in modern American English, "elder" for siblings sounds slightly formal — "older brother/sister" is more natural in daily conversation. "Elder" as a noun ("the elders") is completely standard.
Trick to remember it
Elder = people only, in a comparative relationship with another person (older sibling, respected community senior). Old = everything else (people, things, animals, ideas). In practice, for talking about age in general, you can always use "old" or "older" and never be wrong. "Elder" is a refinement for specific contexts.
Quick rule
Old = general age adjective (people, things, animals). Elder = people only, in family comparison or as a respected community senior (noun).
Did you know?
"Elder" has an interesting religious and political history. In many Protestant churches, an "elder" is an official leadership role — it is not about age, but about position. In The Church of Jesus Christ of Latter-day Saints (Mormons), "Elder" is the title all missionaries carry. And "Elder Scrolls", the video game series, takes its name from sacred scrolls kept by the elders of its fictional universe.
Exercise 1 · Pick the right one
This is an _____ church. It was built in the 14th century.
Exercise 2 · Pick the right one
My _____ sister is a doctor. She graduated ten years before me.
Exercise 3 · Form the word
Old = general age adjective (people, things, animals). Elder = people only, in family comparison or as a respected community senior (noun).
Using "elder" for objects or animals: "this is an elder building" is incorrect — for things use "old" or "older". "Elder" only works with people, and generally in family or community contexts. Also: in modern American English, "elder" for siblings sounds slightly formal — "older brother/sister" is more natural in daily conversation. "Elder" as a noun ("the elders") is completely standard.
Elder = people only, in a comparative relationship with another person (older sibling, respected community senior). Old = everything else (people, things, animals, ideas). In practice, for talking about age in general, you can always use "old" or "older" and never be wrong. "Elder" is a refinement for specific contexts.
Bryan López
Founder of SpeakUP Academy