Collins English-English Dictionary

fifth [fɪfθ]

1. 1. adv fifthly after the fourth person, position, event, etc

2. 2. sentence connector fifthly as the fifth point: linking what follows with the previous statements, as in a speech or argument

3. 3. adj [usually prenominal] coming after the fourth in order, position, time, etc Often written: 5th

4. 4. adj (as noun)

   he came on the fifth

5. 5. n one of five equal or nearly equal parts of an object, quantity, measurement, etc

6. 6. n (as modifier)

   a fifth part

7. 7. n the fraction equal to one divided by five (1/5)

8. 8. n [music] the interval between one note and another five notes away from it counting inclusively along the diatonic scale

9. 9. n one of two notes constituting such an interval in relation to the other - See also perfect diminished interval

10. 10. n an additional high gear fitted to some motor vehicles

11. 11. sentence connector [Etymology] Old English fifta