1. Ordinal of nine.

2. a ninth part

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• ninethy,
• neith,
• ninthth,
• ninto,
• manth,
• knith,
• wenth,
• nanch,
• inthe,
• lenth,
• nineth,
• nmonth,
• wanth,
• nonths,
• cynth,
• mnonth,
• nrth,
• noirth,
• enth,
• ngith

• nintu,
• nintoo.

The adjective form of the word "ninth" is "ninth".

The plural of the "ninth" can be the "ninths".

The singular of the "ninth" can be the "ninth".