Meaning

2 senses
  1. An expression which looks like a sum but where the symbol + has a purely symbolic role, in the sense that the summands cannot be meaningfully combined.

    An element of a free abelian group or vector space regarded as a sum of basis elements.

  2. A sum of an infinite sequence of numbers considered as an indeterminate object, in the sense of being subject to certain algebraic manipulations but not necessarily convergent.

Forms

plural: formal sums
Singularformal sum
Pluralformal sums

regular

See also

neighbours in the dictionary
formal sum — meaning, examples, forms, synonyms | Krumeto