noun
meeting to honor the elderly; respect-for-the-aged gathering
A formal or community event held to show respect and appreciation for older people, often around Respect for the Aged Day (敬老の日).
町内会で敬老会を開きました。
The neighborhood association held a gathering to honor the elderly.
敬老の日 is the national holiday (third Monday of September), while 敬老会 is a specific event or meeting held to honor the elderly, often around that time.
Compound of 敬老 (respect for the aged) and 会 (meeting, gathering).