sixth

UK: /ˈsɪksθ/ US: (siksth)

WordReference Random House Unabridged Dictionary of American English © 2026

sixth  (siksth), adj. 

1. next after the fifth;
   being the ordinal number for six.
2. being one of six equal parts.

n. 

3. a sixth part, esp. of one (¹⁄₆).
4. the sixth member of a series.
5. Music and Dance
   • a tone on the sixth degree from a given tone (counted as a first).
   • the interval between such tones.
   • the harmonic combination of such tones.

adv. 

6. in the sixth place;
   sixthly.

• bef. 900; six + -th²; replacing sixt, Middle English sixte, Old English sixta

sixth′ly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

sixth / sɪksθ/ adjective

1. (usually prenominal) coming after the fifth and before the seventh in numbering or counting order, position, time, etc; being the ordinal number of six: often written 6th
2. (as noun): the sixth to go

noun

1. one of six equal or nearly equal parts of an object, quantity, measurement, etc
2. (as modifier): a sixth part
3. the fraction equal to one divided by six ()
4. the interval between one note and another note six notes away from it counting inclusively along the diatonic scale
5. one of two notes constituting such an interval in relation to the other
   See also major14, minor4, interval5

adverb

1. Also: sixthly after the fifth person, position, etc

sentence_connector

1. Also: sixthly as the sixth point: linking what follows to the previous statements

WordReference Random House Learner's Dictionary of American English © 2026

six /sɪks/   n. [countable]

1. a cardinal number, five plus one.
2. a symbol for this number, as 6 or VI.
3. a set of this many persons or things.

adj. [before a noun]

4. amounting to six in number.

Idioms

5. Idioms at sixes and sevens, in disorder or confusion.

sixth, adj., n. [countable]

WordReference Random House Unabridged Dictionary of American English © 2026

six  (siks), n. 

1. a cardinal number, five plus one.
2. a symbol for this number, as 6 or VI.
3. a set of this many persons or things.
4. Games a playing card, die face, or half of a domino face with six pips.
5. [Cricket.] a hit in which the ball crosses the boundary line of the field without a bounce, counting six runs for the batsman. Cf. boundary (def. 3).
6. Automotive an automobile powered by a six-cylinder engine.
7. Automotive a six-cylinder engine.
8. at sixes and sevens:
   • in disorder or confusion.
   • in disagreement or dispute.

adj. 

9. amounting to six in number.

• bef. 900; Middle English six, sex, Old English siex, syx, seox, sex; cognate with Dutch zes, Low German ses, German sechs, Old Norse sex, Gothic saihs, Latin sex, Greek héx, Sanskrit ṣaṣ