Depth (noun)

1. The distance from the top to the bottom of something.
2. The extent of something from front to back.
3. The degree of intensity or severity of something.

Origin:

Middle english, from old english depthu, from late latin profunditat-, profunditas, from latin profundus deep.

Examples:

1. The depth of the pool was 10 feet.
2. The depth of the ocean is measured in fathoms.
3. The depth of the snow was over a meter.
4. The depth of her understanding of the subject is remarkable.
5. The depth of the wound was serious and required medical attention.