noun
priority seat (on public transport)
Wasei-eigo term for seats on buses and trains reserved for the elderly, pregnant women, and people with disabilities. The term is widely understood but some operators now use 優先席 instead.
wasei-eigo (Japanese-coined English), from silver seat
バスのシルバーシートはお年寄りや体の不自由な方が優先です。
The priority seats on the bus are for the elderly and people with disabilities.
シルバーシートに座っている若者は席を譲るべきだ。
Young people sitting in the priority seats should give them up.