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Definitions

mainframe

[meyn-freym] / ˈmeɪnˌfreɪm /
NOUN
central processing unit
Synonyms






Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

IBM suffered its worst day in 25 years, compounded by Anthropic’s announcement that its Claude AI could modernize COBOL, the programming language holding IBM’s mainframe empire together.

From MarketWatch • Mar. 19, 2026

The analyst said investors might dispute his call, given concern that Anthropic’s Claude Code tool will disrupt IBM’s mainframe business.

From Barron's • Feb. 25, 2026

“But the COBOL-based mainframe remains deeply embedded in large enterprises.”

From Barron's • Feb. 25, 2026

“IBM’s customers have had ample opportunities to migrate off of mainframe and are sticking with the platform given inherent advantages.”

From MarketWatch • Feb. 24, 2026

A few seconds after my eargear was attached and activated, I began to hear the placid monotone of the HR mainframe, droning instructions and other information.

From "Ready Player One: A Novel" by Ernest Cline