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it means that the lecture is given by someone who is not the usual lecturer, usually a visitor invited (by the professor) to speak
What else can I help you with?
Is it correct to say lectures hasn't began yet?
If you mean grammatically, no, the proper speech would be "the lectures have not (or haven't) begun yet".
What is the collective noun for lectures?
There is no standard collective noun for the noun lectures, in which case a noun suitable for the situation is used; for example, a series of lectures, a program of lectures, a yawn of lectures, etc.
From where can you download IIT Lectures?
you can download lectures from internet
Another word for she miss her lectures?
she'd miss her lectures
When was Hulsean Lectures created?
Hulsean Lectures was created in 1820.
When was Tarner Lectures created?
Tarner Lectures was created in 1916.
When was Fashionable Lectures created?
Fashionable Lectures was created in 1872.
When was Lectures on Faith created?
Lectures on Faith was created in 1835.
When was Gifford Lectures created?
Gifford Lectures was created in 1898.
When was Donnellan Lectures created?
Donnellan Lectures was created in 1794.
When was Guildhall Lectures created?
Guildhall Lectures was created in 1959.
When was Warburton Lectures created?
Warburton Lectures was created in 1768.
