This is the 4086th most frequent Arabic word.
دام
"دام" means "lasted" or "continued."
In this sentence, 'دام' means 'lasted' and it implies the duration of an event or a situation.
دام الحفل ثلاثة أيام.
The event lasted three days.
Here, 'دامت' is used in a conditional sense, meaning 'as long as', indicating a period of time tied to a condition.
أدعو لك بالسعادة ما دامت الدنيا.
I wish happiness for you as long as the world exists.
In this sentence, 'دامت' reflects the duration or length of time for the lecture.