LECTURE is a oral presentation intended to present information or teach people about particular subject.. it is use to convey critical information , history, background, thoeries and equation..

The noun "lecture" dates from 14th century, meaning "action of reading, that which is read," from the Latin lectus, pp. of legere "to read." Its subsequent meaning as "a discourse on a given subject before an audience for purposes of instruction" is from the 16th century. The verb "to lecture" is attested from 1590. The noun "lectern" refers to the reading desk used by lecturers. In British English and several other languages the noun "lecture" must grammatically be the object of the verb "to read." it also have different form (tutorial , seminar, workshop etc.)