An expression used to show gratitude when someone does something kind or helpful for you.

Interjection. Can be followed by 'for': 'Thank you for your help.' Short forms: 'thanks' (casual), 'cheers' (very informal British English). Stronger: 'Thank you very much', 'Thank you so much'. 'Ta' is an informal British slang for 'thank you'.

Saying 'thank you' is fundamental to British politeness. In the UK, people say 'thank you' to bus drivers when getting off, to shop assistants, and in many situations Americans might not. 'Cheers' is used informally in Britain both as a toast (when drinking) and as a casual 'thank you'.