Definition of "MI"

MI

proper noun
1. Abbreviation of Michigan, a state of the United States of America.
noun
countable and uncountable, plural MIs
1. Initialism of middle initial.
2. (military) Initialism of military intelligence.
  Quotations
  Three months ago, after a minor argument between a small group of students and a tea shop owner, police arrived on the scene, arrested the students, and beat them up in a nearby police station. Apparently, the tea shop was owned by an MI agent.
  2009, Karen Connelly, Burmese Lessons: A Love Story, Toronto: Random House Canada, page 108
3. (cardiology) Initialism of myocardial infarction.
4. (cardiology) Initialism of mitral insufficiency.
5. (dentistry) Initialism of mesioincisal.
6. (mathematics) Initialism of mathematical induction.
7. (medicine) Initialism of mechanical index.
8. (medicine) Initialism of medical inspection.
9. (information theory) Initialism of mutual information.
  Quotations
  MI excludes words that frequently combine with many words (e.g. the), but can overemphasize low frequency collocation.
  2018, Clarence Green, James Lambert, “Advancing disciplinary literacy through English for academic purposes: Discipline-specific wordlists, collocations and word families for eight secondary subjects”, in Journal of English for Academic Purposes, volume 35, page 112
10. (baseball) Initialism of middle infielder.