unilinear
/ˌjuːnaɪˈliːnɪər/Definitions
1. adjective
Having or relating to a single line or axis of development, growth, or influence.
“The unilinear progression of the plot kept the audience engaged throughout the movie.”
2. noun
A social or cultural system characterized by a single axis of development or influence.
“The anthropologist studied the unilinear social structure of the indigenous tribe.”