Appeared c. 1300 meaning 'strong,' probably Scandinavian — only shifted to 'large in size' in the 15th century, eventually displacing 'great.'
Of considerable size, extent, or intensity; important, significant.
Of uncertain and debated origin. First attested in Middle English around 1300 in northern dialects as 'big' or 'bigge,' meaning 'powerful, strong' rather than 'large.' The most plausible theory connects it to a Scandinavian source — compare Norwegian dialectal 'bugge' (powerful man) and Old Norse 'bugr' (importance). The shift from 'strong/powerful' to 'large in size' occurred during the fourteenth and fifteenth centuries. Like 'bad,' 'big' is an etymological orphan with no certain deeper history. Key roots: uncertain (possibly Scandinavian: "
'Big' originally meant 'strong' or 'powerful,' not 'large' — a fourteenth-century 'big man' was a mighty man, not necessarily a tall one. The shift from strength to size happened gradually, and 'big' only overtook 'great' as the primary English word for physical largeness in the seventeenth century.