SAT IELTS principle Definition A fundamental truth, law, or rule that guides behavior or thought. Example "He refused the bribe on principle." Sign in to save SAT Quiz → IELTS Quiz → ← principal prior → Study tips featuring "principle" Spot the Vocabulary Trap in Every Question Audit Your Own Writing to Find Gaps How Context Clues Save You on the SAT Related words SAT abase SAT abdicate SAT abdomen SAT abduction SAT abet SAT abeyance SAT abject SAT abjure SAT ablution SAT abnegate SAT abnormal SAT abominable