A person who presides over a meeting or organization

A member of a committee or organization who leads discussions

अध्यक्ष

English Usage: The chairman of the board opened the meeting with a welcoming speech.

Hindi Usage: बोर्ड के अध्यक्ष ने बैठक की शुरुआत स्वागत भाषण से की।

A feminine equivalent used informally (though not standard)

महिला अध्यक्ष (非正式的使用，尽管不标准)

English Usage: In many companies, chairmen are increasingly women.

Hindi Usage: कई कंपनियों में, अध्यक्ष increasingly महिलाएं होती हैं।