up

Directed or moving upwards.

Example: The flag is up.

Toward the top or away from the Earth.

Example: The balloon went up.

If a task or result is up to you, it means you are in charge of deciding or doing it.

Example: The outcome of the game is up to the players.

If you are up to something, you are doing or planning it.

Example: What are you up to this evening?

Positive.

Example: It was an up day.