(grammar) The form of a verb used (in English and other languages) with singular nouns and with the pronouns he, she, it and one (or their equivalents in other languages).

(grammar) The form of a verb used with the pronouns you (plural), y'all, you guys, etc., or their equivalents in other languages.

(grammar) The form of a verb used when the subject of a sentence is the audience. In English, the second person is used with the pronouns thou and you. In many languages the singular, applying to one person, and plural, applying to several people, are distinct.

(grammar) Forms of pronouns or verbs used for the speaker or writer of the sentence in which they occur.

(linguistics, with "the") The words, word-forms, and grammatical structures, taken collectively, that are normally used of people or things other than the speaker or the audience.

(number theory) A number that is the sum of all of its divisors except itself.

Perfect in appearance as with the subjects in paintings or photographs, without the common imperfections of real life.

A length of time. / A period of time in history seen as a single coherent entity; an epoch, era.

Designating anything from a given historical era. / Evoking, or appropriate for, a particular historical period, especially through the use of elaborate costumes and scenery.

(chiefly Canada, US) That's final; that's the end of the matter (analogous to a period ending a sentence); end of story.