In the event of traffic congestion, is it considered overtaking if vehicles in one lane travel faster than those in another?

The following are not considered overtaking another vehicle: - When traffic is so dense that vehicles occupy the full width of the carriageway and can only travel at the speed of the vehicle ahead. - Passing a vehicle travelling in lanes or parts of the road designated for certain types of vehicles or certain manoeuvres, or vice versa (acceleration lane, deceleration lane, bus lane, turning lane, etc.)