That is of course the original definition of a meme. However, the internet, and facebook in particular, has put it’s own twist on it, and these days “on the internet” a meme is typically a single picture with a caption that changes the original meaning of the picture into a relatable experience or exclamation.
As with all words with multiple meanings, which one applies is mostly context.
By the original definition of the meaning, Calvin and Hobbes comics are far more of a meme than anything posted here. However, if you asked someone looking at a computer why they are giggling, and they said “Oh, look at this funny meme”, you would not expect to go over and be looking at a comic strip.