Hangul syllable ran

The phrase, not 란 alone, supplies its meaning.

독자란 labels a reader column. In 미인이란 말, the ending frames “beautiful woman” as a description; in 행복하란 말, it reports an instruction to be happy.

Hangul was devised so Korean could be written directly. Its first record dates to 1443; it was formally presented in 1446. Earlier systems such as Idu, Hyangchal, and Gugyeol adapted Chinese characters to write Korean.

Unicode can also represent 란 as three Hangul component letters, called jamo: ᄅ + ᅡ + ᆫ. They are its initial consonant, vowel, and final consonant; Unicode normalization can recompose them as 란.

Why do I see 란 instead of 난?

For “column,” the preceding word decides between 란 and 난.

欄 is the Chinese character behind this sense. After a Sino-Korean noun—a Korean word of Chinese origin—write 란 (독자란); after a native word or loanword, write 난 (어린이난, 가십난).