通信|つうしんtsuushin[0]heiban (flat)

1. noun, suru verb, transitive verb, intransitive verbcorrespondence; communication; transmission; news; signal; telecommunications
   彼かれは、無電むでんで通信つうしんを送おくった。↗

   He sent a message by wireless.

• Synonym連絡れんらくNeutralThe everyday word for getting in touch or letting someone know, as in 「連絡を取る」; 「通信」 leans toward transmitting information by mail, phone, and the like.
• Synonym交信こうしんWrittenTwo-way exchange, mainly by radio or with spacecraft, as in 「宇宙船と交信する」; a written term stressing mutual contact.
• Synonym文通ぶんつうNeutralExchanging letters and nothing else, as in 「文通相手」; 「通信」 covers every means, from mail to phone to networks.
• SynonymコミュニケーションNeutralCommunication between people, centred on mutual understanding; 「通信」 leans toward technical transmission of information.
• Synonym伝達でんたつWrittenConveying orders or information to someone, as in 「指示を伝達する」; the point is that it reaches them, by any means. A written term.
• Related知らせしらせNeutralThe act of telling or the news that arrives, as in 「いい知らせ」; 「通信」 stresses the channel used, such as mail or phone.
• Related報告ほうこくNeutralReporting results or progress to a set recipient, as in 「上司に報告する」; it names the act of reporting, not a means of communication.
• Related通知つうちNeutralNotifying someone of something, as in 「合格通知」 or 「アプリの通知」; the focus is the content conveyed, while 「通信」 is the transmission process.
• Related通報つうほうNeutralReporting an emergency to the police, fire brigade, and the like, as in 「警察に通報する」; it does not cover communication in general.
• Related消息しょうそくWrittenA written word for news of someone's well-being or whereabouts, as in 「消息を絶つ」; it says nothing about transmission means.
• Related便りたよりNeutralNews or a letter from someone, as in 「便りがない」; it leans toward personal correspondence, while 「通信」 also covers technical communication.
• Related伝言でんごんNeutralA verbal message left with a person or in a note, as in 「伝言を頼む」; words meant for a specific person, not communication technology.
• Related送信そうしんNeutralSending a signal or mail one way, as in 「メールを送信する」; the counterpart is 「受信」, receiving.
• Related一報いっぽうWrittenA brief notice or the first report, as in 「ご一報ください」 or 「第一報」; often in polite requests. A formal, written word.
• Related報知ほうちWrittenA written word for notifying; today it survives mostly in fixed terms like 「火災報知器」 and is not used alone in daily speech.
• Related音信おんしんWrittenA written word for letters or news from someone, seen mostly in 「音信不通」; it is about keeping in touch with people rather than technical transmission.
• Related伝送でんそうWrittenA technical, written term for transmitting signals or data, as in 「データ伝送」; it stresses the transmission process itself.
• RelatedインフォメーションNeutralA loanword for information or an information desk, like a shop's 「インフォメーション」; the content itself, not the act of sending it.
• RelatedニュースNeutralNews, as in 「ニュースを見る」; it is the reported content, not a means of communication.
• Related情報じょうほうNeutralInformation or intelligence itself, as in 「情報を集める」; 「通信」 is the act and means of transmitting it.
• Related報ほうWrittenA written word, rarely used alone; mostly a suffix forming terms like 「速報」 and 「訃報」 for types of news. It does not name an act of transmission.
• Related報道ほうどうNeutralNews reporting to the general public through the media, as in 「ニュース報道」; mass-oriented, while 「通信」 is sending information via a medium.
• Related広報こうほうNeutralPublicity work by government offices or companies, as in 「広報誌」; aimed at the public, not a communication technology.
• RelatedコレスポンデンスWrittenA formal loanword for correspondence, found mainly in business letters; in everyday speech people say 「文通」 or 「やり取り」.

Use 「通信」 for transmitting information by mail, phone, or network. For everyday contact say 「連絡」; for exchanging letters 「文通」; for person-to-person communication 「コミュニケーション」; for sending a signal or mail 「送信」. Words like 「報告」「通知」「通報」 name specific acts of telling, while 「消息」「便り」「音信」 are news from a person and 「情報」「ニュース」 the content itself.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 意思いしや様子ようすを知しらせること。信書しんしょをやりとりすること。
2. 郵便ゆうびん・電話でんわなどで情報じょうほうを伝達でんたつすること。