Definition of "Katy"

A diminutive of the female given name Katherine, variant of Katie.  examples

The Missouri–Kansas–Texas (MKT) Railroad.  examples

A locale in the United States.

1. A city in Texas; named for the MKT railroad.  examples

2. An unincorporated community in Missouri.  examples

3. An unincorporated community in West Virginia.  examples

A village in Subcarpathia, Poland.  examples

An apple cultivar from Sweden.  examples