My definition of "lawn" is "whatever low-growing green stuff survives mowing and foot traffic." It includes many species of grass, white clover, tall red clover, short yellow clover, two kinds of plantain, several colors of violets, moss, and dandelions among others.

I like to buy Bee Lawn Mix to patch bare spots.

We have some thistle but we try to keep it out of the lawn part. It's okay in the prairie garden, where pollinators and birds love it.