english
1
general::
Phrase(s): mull something over to think about something; to ponder or worry about something. • That’s an interesting idea, but I’ll have to mull it over. • I’ll mull over your suggestions and reply to you next week.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Ponder, think about, as in She mulled over the offer for some time and then turned it down. [Late 1800s]
American Heritage Idioms