noun
portable electronic dictionary; pocket electronic dictionary; PED
Refers to a dedicated handheld device for looking up words, common among students before smartphones became widespread.
高校生のとき、電子辞書を買ってもらった。
When I was a high school student, I got an electronic dictionary.
noun
digital dictionary; electronic dictionary (app or website)
Covers dictionary software, smartphone apps, and online dictionary services, not just physical devices.
スマホの電子辞書アプリで単語を調べた。
I looked up the word using a digital dictionary app on my smartphone.