Refers to land used for grazing livestock. Often appears in compound words like 牧場 (ぼくじょう) or 牧草地 (ぼくそうち), but can stand alone.
Cows are eating grass in the pasture.
This area used to be a wide grazing land long ago.
牧 (まき, pasture) and 巻 (まき, roll/volume) share the same pronunciation but are completely unrelated in meaning and kanji.
Standard kanji spelling for pasture or grazing land.
Kana spelling may be used in contexts where the kanji is not needed, but the kanji form is more common.
The kanji 牧 combines 牛 (cow) and 攵 (strike/action), originally depicting herding cattle. The reading まき is the native Japanese word for pasture.