twelfth

n.

1. The ordinal number matching the number 12 in a series.
2. One of 12 equal parts.

[Middle English twelfthe, alteration of Old English twelfta.]

twelfth twelfth adv. & adj.

The Interval of a compound 5th, i.e. the sum of an octave and a 5th.

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IN BRIEF: Coming next after the eleventh and just before the thirteenth in position.

There is a holiday on the twelfth day after the school year begins.

Note: click on a word meaning below to see its connections and related words.

The noun has one meaning:

Meaning #1: position 12 in a countable series of things

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The adjective twelfth has one meaning:

Meaning #1: coming next after the eleventh and just before the thirteenth in position
  Synonym: 12th

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