subadditive

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adjective

Such that the image of a sum is at most the sum of the images of the summands.

“The square-root function is subadditive under addition because #92;sqrt#123;a#43;b#125;#92;le#92;sqrta#43;#92;sqrtb.”

Opposite
superadditive
Scrabble 18
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Meanings

adjectivesubadditive (not comparable)
  1. not comparableSuch that the image of a sum is at most the sum of the images of the summands.

    The square-root function is subadditive under addition because #92;sqrt#123;a#43;b#125;#92;le#92;sqrta#43;#92;sqrtb.

Synonyms & antonyms

Opposite
superadditive

Origin

From sub- + additive.

Full word history & related roots →
Cite this entry
APA

subadditive. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/subadditive

MLA

“subadditive.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/subadditive. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “subadditive,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/subadditive.

Source: subadditive on Wiktionary, CC BY-SA 4.0.