Meaning of PERIODICAL in English

PERIODICAL

I. pe ‧ ri ‧ od ‧ ic AC /ˌpɪəriˈɒdɪk◂ $ -ˌpɪriˈɑː-/ BrE AmE ( also periodical ) adjective [only before noun]

happening a number of times, usually at regular times:

periodic home visits by nurses

—periodically /-kli/ adverb :

Teachers meet periodically to discuss progress.

II. pe ‧ ri ‧ od ‧ i ‧ cal AC /ˌpɪəriˈɒdɪk ə l $ ˌpɪriˈɑː-/ BrE AmE noun [countable]

a magazine, especially one about a serious or technical subject

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.