The one below it is even earlier, 1839, that is the one I'd always thought was the first 'selfie' - it was either that or one of a woman who took a photo of herself in a bedroom mirror - I found it fascinating when I read about it Love those old photo stories. Apparently the guy who took it would have had to stand dead still for 3 minutes or more, depending on the light at the time of shooting
Selfie had became a slang word for self-portrait. It had kind of became a new word for when using a smartphone instead of an actual camera to take a photo of self (and usually for the purpose of uploading to social media). Taking self-portrait photographs of yourselves in the mirror have been around for like a hundred of years, since the birth of photography. I can't understand why do people nowadays, when they see an old self-portrait photograph, they goes like "Oh look! An early selfie!" as if the meaning of self-portrait never exist.
But then again, self-portrait already exists long before photography when some people would paint a picture of themselves while looking at a mirror, so in a sense, selfie already exists very, very long before smartphones.