(virology) A phenomenon that can develop during a pandemic where after a group recovers and infections appear to decrease, another group becomes infected and causes a recurrence in cases.

Nickname for the city of Chicago, Illinois, in the United States of America.

plural of second grader

(US, education) A pupil who is in second grade.

(taxation, UK) The situation where certain shares are pooled and treated as a single asset for tax purposes.

Alternative form of arcsecond

plural of arc-second

(rail transport) Alternative form of secondman.

(grammar) In Latin, the perfect, imperfect or pluperfect tense. / (grammar) In Greek, the aorist, imperfect or pluperfect tense.

The male spouse of the second-in-command or first in the line-of-succession of a political jurisdiction.