English Reference
Noun

robustness

n.
C1 Advanced US /ɹoʊˈbəstnəs/ UK /ɹəʊbˈʌstnəs/ ro·bust·ness UK spelling robustnesses

n.the quality of being strong and able to survive difficult situations. It describes something that does not break easily or change its behavior when things get tough.

n.the quality of being strong, sturdy, or resistant to damage or failure. Often used in technical contexts to describe systems or materials that maintain performance under stress.


SIMPLE

The new software has high robustness against viruses.

CONTEXTUAL

Engineers tested the bridge's robustness by simulating extreme weather conditions and heavy traffic loads.

COMPLEX

The algorithm's robustness is its most significant advantage, allowing it to process incomplete data sets without producing inaccurate or misleading results.

In other words, when fitness is equal, evolution tends to favor directions that confer greater robustness and tolerance to change, properties that themselves provide a survival advantage.

Phys.org· 27 Aug 2026

It is the latest setback for Mount, but Carrick has brushed aside any concerns regarding his robustness.

The Guardian· 21 Aug 2026

From robust + -ness.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Occasional
Updated