1To visit someone who is sick or injured in order to comfort them or ask after their condition — such as visiting someone in the hospital.
入院中の祖母を見舞うため、花を持って病院へ行った。
I went to the hospital with flowers to visit my hospitalized grandmother.
彼は毎週末、入院している友人を見舞っている。
He visits his hospitalized friend every weekend.
恩師が入院したと聞いて、すぐに見舞った。
When I heard my former teacher had been hospitalized, I went to see him right away.
2To strike or afflict suddenly, as of a typhoon, disaster, or misfortune — used not only of people but also of regions or society, and most often in the passive form 見舞われる ("to be struck by").
大型台風が関東地方を見舞い、各地で被害が出た。
A large typhoon struck the Kanto region, causing damage in many areas.
経済危機が国を見舞い、多くの企業が倒産した。
An economic crisis struck the country, and many companies went bankrupt.