Noun
(US, Canada, agriculture, horticulture) The combination of maize (corn), pole beans (Phaseolus vulgaris or climbing beans, string beans, etc.), and squash (i.e. pumpkin), especially when planted together in intertwined plantings.
Used other than figuratively or idiomatically: see three, sisters.
Source: en.wiktionary.orgNo one could have called Mr. Standen quick-witted, but the possession of three sisters had considerably sharpened his instinct of self-preservation. Georgette Heyer
I have three sisters and I've always wanted a brother, so I was really interested in that notion. Ryan Phillippe
Speaking as somebody with three sisters and a very largely female Muslim family, there is not a single woman I know in my family or in their friends who would have accepted the wearing of a veil. Salman Rushdie
I have a hippopotamus skull next to my bed, called Gregory. When I was six, my three sisters and I clubbed together and paid £4 for it in a junk shop. We collected owl pellets, ostrich eggs and sheep skulls for our natural history museum at home. Deborah Moggach
I was a middle child. I grew up in Brooklyn with three sisters and a brother. You know what that means: everybody is constantly fighting with everybody and you are in the middle of the storm trying to make peace. That is your life. Making everybody work and play well together. Richard Parsons
I grew up in Cazenovia, N.Y. I'm the second of five children, with three sisters and a brother. Siobhan Fallon Hogan