A businessman gives an informative lecture.
The definition of informative is something that contains useful, helpful or relevant information or details.
A lecture in which you learn a lot is an example of an informative lecture.
giving information; educational; instructive
Origin of informativeMedieval Latin informativus from Classical Latin informatus, past participle of informare: see inform
Serving to inform; providing or disclosing information; instructive.
(comparative more informative, superlative most informative)