everyone; the public; members of the public
Polite expression used to address or refer to people in society at large, often in announcements, apologies, or formal messages.
We sincerely apologize for causing trouble to everyone in the public.
世間の皆様のご支援に感謝いたします。
We are grateful for the support of the public.
Compound of 世間 (society, the world) + の (possessive particle) + 皆様 (polite 'everyone'). A set phrase used in formal public communication.