- prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity
 - old (of people)
 - venerable (person)
 - experienced
 - of long standing
 - always
 - all the time
 - of the past
 - very
 - outdated
 - (of meat etc) tough
 
Resources
- Wiktionary: 老
 - MDBG: 老
 - Examples with 老 on Tatoeba