Lone (adjective)

1. Being the only one; solitary.
2. Without companions; alone.

Origin:

Old english lān "belonging to one", of germanic origin; related to dutch and german een "one".

Examples:

1. The lone survivor of the crash was rescued.
2. He was the lone ranger on the project.
3. The lone wolf howled at the moon.
4. The lone tree stood in the field.
5. The lone candle flickered in the darkness.