What is the meaning of asserted in case of an interrupt in STM32L4 Series Microcontroller?

[Ankyt]

I am using NUCLEO-L4R5ZI-P devlopment board. I am trying to use USB OTG functionality. I used RM0432 for programming purpose.

For e.g. I want to know about Session request protocol interrupt in which reference manual mention: "In device mode, this interrupt is asserted when VBUS is in the valid range for a B-peripheral device".

Can any one please help me to understand here?

[waclawek.jan]

asserted = set, active

JW