Webster's Revised Unabridged Dictionary · 1913

sign on

sign on (sīn` on") , intransitive verb

To begin a communication, especially one conducted by radio waves.

Text from the public-domain GNU Collaborative International Dictionary of English, derived from Webster's Revised Unabridged Dictionary (1913). Definitions marked with were added by later GCIDE contributors and are not in the original 1913 edition.

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