Hello/həˈləʊ/ Definition 1 of 3Pro Tip 1/3Commonly Casual Used frequently in informal situations to start a conversation. Hello, what's your name? Pro Tip 2/3Friendly Tone Often signals friendliness and is a warm way to engage with others. Hello! Nice to meet you! Pro Tip 3/3Multi-Context Use Suitable for both face-to-face and telephone conversations. Hello, can I speak to Alice, please?