- acronym forWorld Health Organisation (written as WHO)
- noun the United Nation’s agency for health, promoting global health education and provision of healthcare facilities.
Origin & History of “who”
Who goes right back to Indo-European *qwos, *qwes (source also of Russian kto ‘who’), whose neuter form *qwod gave English what. Its prehistoric Germanic descendant was *khwaz, *khwez, which has evolved into German wer, Dutch wie, Danish hvo, and English who. Whom comes from the Old English dative form hwǣm.