1. The day last past; the day next before the present.

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

• yestureday,
• yeseterday,
• testerday,
• yestoday,
• yesterdau,
• yesteraday,
• yestday,
• yesteray,
• hyesterday,
• lyesterday,
• yesterdeay,
• yestaday,
• yousterday,
• yeatserday,
• yesrterday,
• yestserday,
• yestersday,
• yeasterday,
• yestrday,
• yesterdayy

• yesteryear.

The adjective form of the word "yesterday" is "yesterday's".

The plural of the "yesterday" can be the "yesterdays".

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