Thick; having considerable thickness (physical thickness).
この本はページが多くて表紙も厚い。
This book has many pages and a thick cover.
冬は厚いコートが必要だ。
You need a thick coat in winter.
氷が厚くて湖の上を歩けた。
The ice was thick enough to walk on the lake.
Kind, cordial, hospitable; showing warm or strong affection/consideration.
彼女は客に対していつも厚くもてなす。
She always treats guests with great hospitality.
あの先生は生徒に対して厚い信頼を寄せている。
That teacher places deep trust in his students.
彼らは厚い友情で結ばれている。
They are bound by strong/deep friendship.
Serious (of an illness); grave or severe condition (somewhat literary).
彼は病が篤く、しばらく入院している。
His illness is severe, and he has been hospitalized for a while.
Abundant or plentiful; used for a large amount or strong degree (e.g., support).
彼は取引先に厚い支援を受けている。
He receives strong support from his business partners.
この店は常に厚い需要がある商品を扱っている。
This shop always deals with products that have high demand.