On things that are past, it is needless to pursue past mistakes; let bygones be bygones.

(geometry) the golden ratio

The Kingdom of Denmark

The Kingdom of Norway

(rare) an albatross, especially the short-tailed albatross (Phoebastria albatrus)

responding to an emergency

a thoracic diaphragm

retribution, karma: good fortune for those who have done good deeds, and misfortune for those who have done bad deeds

appropriateness, suitability, fitness

a round trip, going back and forth / coming and going / (by extension) exchange (conversations, letters, etc.)