on principle

on principle

Guided by, due to, or according to a certain principle. On principle, I never socialize with my students outside of school. I've never read his work, but because of his political statements I dislike him on principle.
See also: on, principle
Farlex Dictionary of Idioms.

on principle

1. On moral or ethical grounds. As James Russell Lowell wrote about Alexander Pope in 1871, "There was a time when I could not read Pope, but disliked him on principle." [First half of 1800s]
2. According to a fixed rule or practice. For example, The police were locking up the demonstrators on principle. [First half of 1800s]
3. on general principle. For no special reason, in general, as in Dean won't touch broccoli on general principle. [First half of 1800s]
See also: on, principle
The American Heritage® Dictionary of Idioms by Christine Ammer.

on ˈprinciple

because of your beliefs or ideas about what is right or how people should behave: I quite like meat, but I don’t eat it on principle.
See also: on, principle
Farlex Partner Idioms Dictionary

on principle

According to or because of principle.
See also: on, principle
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • in principle
  • so be it
  • survival
  • survival of the fittest
  • (the) survival of the fittest
  • play politics
  • found (up)on
  • found on
  • sin against
  • sin against (someone or something)