this is where mertucio and tybalt fight, mertucio is felled by tybalts hand, romeo slays tybalt in revenge for mertucio, and the prince banishes romeo for killing tybalt, instead of the death sentence as promised.
In the noun form, the accent goes on the first syllable. CONduct. In the verb form, the accent goes on the second syllable, conDUCT.
Based on that the use of foreboding in this sentence is used as a noun, the definition of foreboding would be:
A feeling or sense that something bad is going to happen.