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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

He views the mainframe business as “resilient” given examples from IBM of how customers are growing, not shrinking, their workloads.

From MarketWatch • Feb. 24, 2026

In his view, although alternatives have been available for decades, clients are sticking with mainframe for a host of reasons: reliability and speed advantages, better cost efficiency at scale, and security such as quantum-safe encryption.

From Barron's • Feb. 24, 2026

Along with Sydney, Paris, Rio, and Kat, she was on her way to see if they could break into Asgard, Sinclair Scientifica’s secondary headquarters, so she could hack into the company’s mainframe.

From "City Spies" by James Ponti