The ordinal form of the number eight

• In sequence, coming after the seventh

The person or thing in the eighth position

One of eight equal parts of a whole

• The fraction 1/8

Informal US: one eighth of an ounce of marijuana or other drugs

• Approximately 3.5 grams

To divide by eight

• To split into eight equal parts

Music: the interval spanning eight scale degrees; an octave

• The higher note has double the frequency