All 3 Uses

pedantic
in
Love's Labour's Lost
(Auto-generated)

And I,—Forsooth, in love; I, that have been love's whip; A very beadle to a humorous sigh; A critic, nay, a night-watch constable; A domineering pedant o'er the boy, Than whom no mortal so magnificent!†
Scene 3.1

pedant = someone too concerned with formal rules, details, or book learning
He presents Hector of Troy; the swain, Pompey the Great; the parish curate, Alexander; Armado's page, Hercules; the pedant, Judas Maccabaeus: And if these four Worthies in their first show thrive, These four will change habits and present the other five.†
Scene 5.2
The pedant, the braggart,
Scene 5.2 *

pedant = someone too concerned with book learning

Definitions:

(1) (pedantic)
too concerned with formal rules, details, or book learning
(2) (meaning too rare to warrant focus)
In historic literature, you may see pedant used as a synonym for school teacher.