Littlest

adjective

1. Small in size.

   "This is a little table."

2. Insignificant, trivial.

   "It's of little importance."

3. Very young.

   "Did he tell you any embarrassing stories about when she was little?"

4. (of a sibling) Younger.

   "This is my little sister."

5. (also Little) Used with the name of a place, especially of a country or its capital, to denote a neighborhood whose residents or storekeepers are from that place.