Formal:
* Greetings: A very formal and general way to greet someone.
* Good morning/afternoon/evening: Standard greetings depending on the time of day.
* How do you do? A formal greeting, often used in more traditional settings.
* It's a pleasure to meet you. Formal and polite, especially in a professional setting.
Informal:
* Hi: A casual and friendly greeting.
* Hey: Even more casual than "hi".
* Yo: Very informal, typically used among close friends.
* What's up? A casual greeting that invites a response.
* How's it going? A friendly and informal way to ask how someone is doing.
Other options:
* Good day: A polite and slightly old-fashioned greeting.
* Salutations: A formal and literary greeting.
* Ahoy! A playful greeting, often used in nautical contexts.
* Aloha: A Hawaiian greeting that means "hello" and "goodbye".
* Namaste: A Hindu greeting that means "I bow to you" or "the divine in me recognizes the divine in you".
Specific greetings:
* Bonjour: French for "hello"
* Hola: Spanish for "hello"
* Ciao: Italian for "hello" and "goodbye"
* Guten Tag: German for "good day"
The best greeting to use depends on the situation, your relationship with the person you are greeting, and the formality of the occasion.