The United Nations Conference on Environment and Development held in Rio de Janeiro in 1992.

Any of various academic sessions held in the summer at schools or universities when the usual students are away; either for supplementary or remedial study or as part of distance learning.

A call to do something, especially to come. / (law) A notice summoning someone to appear in court, as a defendant, juror or witness. / (military) A demand for surrender.

(transitive) To serve someone with a summons.

Third-person singular simple present indicative form of summon

The period or season of summer.

summarization; summary; summing up. / (mathematics) summing; summing up; adding (adding up) of a series of items.

(uranography) A bright asterism of the northern summer sky. Its corners are the three 1st-magnitude stars Altair (α Aql), Deneb (α Cyg), and Vega (α Lyr).

(manner) In a summary manner. / (duration) Over a short period of time, briefly.

A house owned not as a primary residence and used as vacation home during warm weather months of the year. / An outbuilding in a garden where the owners can relax in warm weather.