Definify.com
Webster 1913 Edition
Three-way
Three′-wayˊ
,Adj.
 Connected with, or serving to connect, three channels or pipes; 
as, a 
. three-way 
cock or valveDefinition 2025
three-way
three-way
See also: threeway
English
Adjective
-  (attributive) relating to three different directions.
- a three-way valve
 
Derived terms
Translations
in three directions
| 
 | 
Noun
three-way (plural three-ways)
-  Sexual activity involving three persons; a threesome; a ménage à trois.
-  2007, Lainie Speiser, Threesomes: For Couples Who Want to Know More, page 22:
- But how many men will actually admit to having had a three-way with another man and one woman?
 
-  1995, Deborah Abbott, Ellen Farmer, From Wedded Wife to Lesbian Life: Stories of Transformation, page 263.
- I had a three-way with two other women in my class.
 
-  1992, Dennis Cooper, Frisk, page 117.
- A guy Julian and you had a three-way with millions of years ago. I used to watch you guys **** through the keyhole sometimes.
 
 
-  2007, Lainie Speiser, Threesomes: For Couples Who Want to Know More, page 22:
- A serving of Cincinnati chili with spaghetti and cheese.