NAmE//ɛb//the ebb[usually singular]
in a poor state; worse than usual Morale among teachers is at a low ebb.
at a low ebbjump to other results
the repeated, often regular, movement from one state to another; the repeated change in level, numbers, or amount the ebb and flow of the seasons She sat in silence enjoying the ebb and flow of conversation. He had known her long enough to recognize the ebb and flow of her moods.
the ebb and flow (of something/somebody)jump to other results