Lecture in English seems to mean talk or speech.
In Romanian it means to read as a verb (though we prefer a citi) and reading as a noun.
In English, lecture is primarily used relating to academia. Either as in "the students go to a lecture" (noun) or "the lecturer/professor is lecturing/lectures his students" (verb). As a result talk or speech aren't really synonyms as it is means more of a detailed, one-way discussion of a particular topic. It sounds like it's a bit different in Romanian so it's confusing!