a diversion that occupies one's time and thoughts (usually pleasantly); "sailing is her favorite pastime"; "his main pastime is gambling"; "he counts reading among his interests"; "they criticized the boy for his limited pursuits"
a time period usually extending from Friday night through Sunday; more loosely defined as any period of successive days including one and only one Sunday
the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
the warmest season of the year; in the northern hemisphere it extends from the summer solstice to the autumnal equinox; "they spent a lazy summer at the shore"