ad — meaning in English

English meaning

ate verb The past tense of "eat".
ed noun A short informal way of saying "education," especially in school or course names.
linesman noun An official who assists the main referee.

ad is used for these senses in English:

ate (obsolete) formed, up until Early Modern English (later seldom used but archaically, in poetry, or in religious writings), regular past participles of verbs ending in -ate, alternatively used alongside -ated from as early as Middle English
ed Used to form possessional adjectives from nouns, in the sense of having the object represented by the noun.
assistant referee (soccer, British) : One of the two officials at an association football match, previously known as linesmen, who assist the referee.
linesman (football) An assistant referee.

verb The past tense of "eat".
noun An older sister, or a respectful way of addressing a woman who is older than you, even if she is not a blood relative.

noun A short informal way of saying "education," especially in school or course names.
noun A short informal way of saying "edition" or "editor," often seen in publishing credits.