(informal, rare) To attend summer camp.

(chemistry) A polycyclic aromatic hydrocarbon, of scientific interest because the molecule can be considered a fragment of buckminsterfullerene.

plural of poison sumac

plural of summer sausage

Sausage cured to the extent that it requires no refrigeration.

(education) The phenomenon where incoming students who have committed to attend a college or university change their minds during the summer and opt to attend another institution.

plural of sump pit

Synonym of St. Luke's summer.

A short period of warm weather around St Luke's Day (18 October); an Indian summer (also figuratively).

plural of sump pump