Up (adverb)

1. Toward a higher place or position.
2. Toward a higher level of intensity.
3. From a lower place to a higher place.
4. From a lower level to a higher level.
5. To or toward an upright position.

Origin:

Middle english, from old english up; akin to old high german uf up, latin super over.

Examples:

1. She looked up at the sky.
2. The sun is up.
3. I'm going up the stairs.
4. The stock market is up today.
5. He stood up from his chair.