1.
side, beside
The area next to something.
2.
width, horizontal
The horizontal dimension.
横 indicates the horizontal dimension or the area beside something.
SENSE 1 - BESIDE/SIDE:
SENSE 2 - HORIZONTAL/WIDTH:
OPPOSITE:
縦 (vertical, length) ↔ 横 (horizontal, width)
COMPOUNDS:
Related Words
Antonym:
縦 (vertical, lengthwise)