Definition:Decreasing Sequence/Also known as

Decreasing Sequence: Also known as
A decreasing sequence is also referred to as order-reversing.

Some sources use the term descending.

Some sources refer to a decreasing sequence which is not strictly decreasing as non-increasing or monotone non-increasing.

Some sources refer to a decreasing sequence as a monotonic decreasing sequence to distinguish it from a strictly decreasing sequence.

That is, such that monotonic is being used to mean a decreasing sequence in which consecutive terms may be equal.

does not endorse this viewpoint.