a person whose job is to help or serve people in a particular place or at an event
The flight attendant smiled as she offered drinks to the passengers.
A parking lot attendant guided us to an empty space on the busy weekend.
✦ From Anglo-French attendant, present participle of Old French attendre “to attend, wait upon”, from Latin attendere “to give heed to”.
happening or existing together with something else, especially as a result of it
The project was delayed by budgeting issues and the attendant paperwork.
Living in a big city brings noise and other attendant problems.
✦ Adjectival use of the noun and present participle of "attend", first recorded in English in the early 17th century.