Existence (noun)

1. The state or fact of being alive.
2. The state or fact of being real and having an objective, independent existence, especially in contrast to something that is imagined or believed.
3. The state of being in a particular place or situation.

Origin:

Late middle english: from old french, or from latin existentia, from existere "come into being".

Examples:

1. The existence of life on other planets is still a matter of speculation.
2. The existence of ghosts is a popular belief in many cultures.
3. The existence of poverty in the midst of wealth is a global issue.
4. His existence was marked by hardship and struggle.
5. The existence of the company depends on the success of its products.