Former (adjective)

1. Existing or coming before the present or current thing or person.
2. Being the first of two or more things or people previously mentioned or identified.
3. Being the first of two or more things or people previously mentioned or identified, as opposed to the latter.
4. Being the first in a series of things or people that are similar or related.
5. Being the one that existed or came before the present or current thing or person.

Origin:

The word former comes from the middle english word "formere" which means earlier or preceding. this word was used to refer to something or someone that came or existed before the present or current thing or person.

Examples:

1. The former President.
2. The former employee.
3. He is the former and she is the latter.
4. The former version of the software.
5. He is the former and she is the current.