noun (used with a plural verb) Grammar.
a set of inflected forms of a form class from which all the other inflected forms can be derived, as sing, sang, sung; smoke, smoked.
Principal vs. PrincipleIs the head of a school called a principal or a principle? These two words are frustratingly similar, leaving even the most experienced English speakers to second-guess which word means what. So, in today’s lesson, we’ll discuss the distinct meanings between these easy-to-confuse terms— and leave you with a little trick to help differentiate between your principals and your principles. What is a principal? A …
Origin of principal parts
First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for principal parts
grammar the main inflected forms of a verb, from which all other inflections may be deduced. In English they are generally considered to consist of the third person present singular, present participle, past tense, and past participle
the sides and interior angles of a triangle
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