The act or result of addition; a sum.

plural of sum

Third-person singular simple present indicative form of sum

simple past tense and past participle of sum

plural of summing

plural of Sum

A Chinese vegetable, a variety of Brassica rapa parachinensis subspecies, similar to bok choy but slimmer, with smooth green leaves and pale green stems, and clusters of flowers on the tips of the inner shoots

(mathematics) The vector whose initial and final points are those of a series of other vectors laid end to end.

The union of a finite sequence of surfaces taken over a disk common to every adjacent pair of the sequence, such that the boundary of the disk comprises some even number of closed arcs, disjoint except at their endpoints, which are alternatingly subarcs of the two surfaces' boundaries.

A summary.