1. The cardinal number equal to 5 + 1.
2. The sixth in a set or sequence.
3. Something having six parts, units, or members, especially a motor vehicle having six cylinders.
at sixes and sevens
In a state of confusion or disorder.
[Middle English, from Old English; see s(w)eks in the Appendix of Indo-European roots.]
six adj. & pron.
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