Expand (verb)

1. To become or make larger or more extensive.
2. To open out or unfold.
3. To increase in amount, number, or volume.
4. To develop or become more detailed or comprehensive.
5. To fill a space by becoming larger.

Origin:

Late middle english: from latin expandere, from ex- "out" + pandere "spread out".

Examples:

1. The business expanded rapidly.
2. He expanded the company into new markets.
3. The balloon expanded as it filled with air.
4. The argument expanded to include new evidence.
5. The universe is expanding.