The English greeting 'hello' evolved from older forms of address and calls, originally not primarily a greeting.

The etymology of 'hello' traces back to Old English 'hāl' (meaning 'whole, healthy') and 'hail,' a salutation wishing health. However, 'hello' itself appears to have gained prominence in the 19th century. Early usages, particularly in American English, often functioned as an exclamation to attract attention ('Hollo!') or express surprise, much like 'hey' or 'hark.' It wasn't until the advent of the telephone that 'hello' became firmly established as a standard greeting. Thomas Edison is widely credited with popularizing its use as a telephone salutation, advocating for it over Alexander Graham Bell's preferred 'Ahoy!', thereby cementing its role in modern communication.