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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 idea of shifting off of mainframe is not a new concept,” Daryanani concluded.

From Barron's • Feb. 24, 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

Cornell was an early adopter of mainframes and his professor mentors were moving from punch cards to mainframe batch processing.

From The Wall Street Journal • Jan. 22, 2026

Once a program was ready, you walked over to whatever mainframe computer you had access to and gave the stack of cards to an operator.

From "Outliers" by Malcolm Gladwell