欄

A phono-semantic compound composed of:

木 — semantic component meaning “wood” (indicating something made of wood, like a fence or railing). 闌 — phonetic component indicating the sound (란 / lán). Originally, it referred to wooden railings or barriers, later extended to mean divisions or sections.
Semantic development: - wooden railing or fence; - barrier or partition; - section, column, or divided space, The meaning expanded from physical barriers (railings) to abstract divisions, such as columns in text or tables.

난간 (欄干) — railing; balustrade

난간대 (欄干臺) — railing structure

신문란 (新聞欄) — newspaper column

빈칸 (空欄) — blank space; empty field

In modern usage, 欄 is very common in contexts like forms, spreadsheets, and media columns.
Related characters: 闌 — barrier; to block 柵 — fence 隔 — to separate