You say ' goodnight ' to someone late in the evening before one of you goes home or goes to sleep. Goodnight is often used in english and is a little bit more informal. It is more often to use Ò€œgoodnightÒ€ in a text message as a way to show that you want to end the conversation and go to sleep.

Said when people leave each other in the evening or before going to bed or to sleep: Learn more.