lecture Definition in the Cambridge English Dictionary
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Definition of “lecture” - English Dictionary

Definition of "lecture" - American English Dictionary

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lecturenoun [C]

 us   /ˈlek·tʃər/

lecture noun [C] (FORMAL TALK)

a ​formal, ​preparedtalk given to a ​group of ​people, esp. ​students: a lecture on ​astronomy

lecture noun [C] (CRITICISM)

a ​serioustalk given to ​criticize someone or give someone ​advice: She gave him a lecture about his ​tablemanners.
lecturer
noun [C]  us   /ˈlek·tʃər·ər/

lectureverb [I/T]

 us   /ˈlek·tʃər/

lecture verb [I/T] (TALK FORMALLY)

to give a ​formal, ​preparedtalk to a ​group of ​people, esp. ​students: [I] She’s lecturing on the ​geology of the ​region.

lecture verb [I/T] (CRITICIZE)

to give someone a ​serioustalk to ​criticize or give ​advice to that ​person: [T] He lectured me on the need to ​keepaccuraterecords.
(Definition of lecture from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "lecture" - British English Dictionary

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lecturenoun [C]

uk   /ˈlek.tʃər/  us   /-tʃɚ/
B1 a ​formaltalk on a ​serioussubject given to a ​group of ​people, ​especiallystudents: We went to a lecture onItalianart. Who's giving the lecture this ​afternoon?
Compare
an ​angry or ​serioustalk given to someone in ​order to ​criticizetheirbehaviour: My ​dad gave me a lecture on the ​evils of ​alcohol last ​night.
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lectureverb

uk   /ˈlek.tʃər/  us   /-tʃɚ/
C2 [I] to give a ​formaltalk to a ​group of ​people, often at a ​college or ​university: For ten ​years she lectured inlaw. She ​travelledwidely in ​NorthAmerica, lecturing on women's ​rights. [T] to ​talkangrily or ​seriously to someone in ​order to ​criticizetheirbehaviour: His ​parents used to lecture him on his ​tablemanners.
(Definition of lecture from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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