What is the definition of meme?

Biological Definition (from Dawkins): A meme is the basic unit of cultural transmission, or imitation.


Psychological Definition (from Henry Plotkin): A meme is the unit of cultural heredity analogous to the gene. It's the internal representation of knowledge.


Cognitive Definition (from Daniel Dennet): A meme is an idea, the kind of complex idea that forms itself into a distinct, memorable unit. It is spread by vehicles that are physical manifestations of the meme.


Brodie finally settles on a working definition: A meme is a unit of information in a mind whose existence influences events such that more copies of itself get created in other minds. He also makes the point that memetics is a scientific model: "It's one way of looking at things. It's looking at ideas - memes - as distinct entities in competition for a share of your mind and a share of everyone else's. When those ideas are harmful… understanding this model can show you how to combat the infection."