English definition of “old”
LIVED LONG › having lived or existed for a long time: an old man/woman an old house We're all getting older. Children should show some respect for the old.
USED A LOT › having been used or owned for a long time: You might get dirty so wear some old clothes.
AGE › used to describe or ask about someone's age: How old are you? She'll be 3 years old this month.
an old friend/enemy, etc › someone who has been your friend/enemy, etc for a long time: I met an old friend who I was at college with.
BEFORE [always before noun] › used before or in the past: I think the old system was better in many ways. When he visits his mother, he sleeps in his old room.