Definition of "mono"

mono¹

/ˈmɒnəʊ/

noun
uncountable
1. (informal) Clipping of mononucleosis.

mono²

/ˈmɒnəʊ/

noun
plural monos
1. (slang, UK, Australia) A bicycle or motorcycle trick where the front wheel is lifted off the ground while riding

mono³

/ˈmɒnəʊ/

adjective
not comparable
1. (colloquial) Monaural or monophonic; having only a single audio channel.

mono⁴

/ˈmɒnəʊ/

adjective
not comparable
1. (colloquial) Monochrome.
  Quotations
  The excellent on-screen display of italics, superscripts and subscripts, and other niceties available on the color screen now display on mono monitors, but with the inherently superior text font of the mono mode.
  1985, PC Mag, volume 4, number 4, page 125

mono⁵

/ˈmɒnəʊ/

noun
plural monos
1. (category theory) Abbreviation of monomorphism.

mono⁶

/ˈmɒnəʊ/

adjective
comparative more mono, superlative most mono
1. (chiefly informal) Monoamorous, monogamous.
noun
plural monos
1. (informal) A monogamous person.
  Quotations
  For some monos, there are no acceptable mono—poly solutions as far as they are concerned.
  2010, Leonie Linssen, Love Unlimited: The Joys and Challenges of Open Relationships

mono⁷

/ˈmɒnəʊ/

adjective
comparative more mono, superlative most mono
1. (chiefly informal) Monosexual.
  Quotations
  People who do wish to be recognizable as trans or bi are often coercively passed off as cis or mono anyway.
  2013, Shiri Eisner, Bi: Notes for a Bisexual Revolution
  That is, establishing as it does a replacement binary (mono versus bi, rather than hetero versus homo) it functions to erase lesbian and gay specificity. In turn, this fails to consider, and even elides, important structural inequities between the hetero- and homosexual categories. The difficulty of establishing bisexual legitimacy in a discursive context of oppositional categories was acknowledged by a number of participants. For some, invoking the mono/bi dichotomy affords bisexuality [...]
  2013, Dawn Atkins, Bisexual Women in the Twenty-First Century, page 37