NOTE: This is measurable, hence objective
This week saw a 4 percent decline across all the major stock indexes.
Biologists have reported a decline in bird populations in parts of England.
The drought caused a noticeable decline in the water table.
WordNet 3.0 Sense Numbers: 1, 3
NOTE: this is a judgement, hence subjective
There were many factors in the decline of the Roman Empire.
The actor admitted that his career had been in decline for several years.
Analysts still think this industry is on the decline.
WordNet 3.0 Sense Numbers: 2
We worked our way slowly down the steep decline of the glacier.
Mary braked as she saw the sudden decline in the road.
WordNet 3.0 Sense Numbers: 4
NOTE: nominalization - 'her decline of the offer' -> she declined the offer
The firm was disappointed in her decline of their offer.
John's mother just would not accept our decline of an offer to dinner.
WordNet 0.0 Sense Numbers: thesaurus