old (adj.)

having existed a long time

Examples

• That is an old castle.

Key rules

• Old describes age of things; older is used for people
• Elder is used before a noun for a family member: my elder sister
• Use older for comparing people

Common mistakes

• He is more old than me → He is older than me
• My elder is older? → My older brother is taller

Use cases

• Describing age
• Talking about family members
• Comparing things