What is the meaning of Cauliflower?

Brassica oleracea var. botrytis, an annual variety of cabbage, of which the cluster of young flower stalks and buds is eaten as a vegetable.

The edible head or curd of a cauliflower plant.

The swelling of a cauliflower ear.

To (cause to) swell up like a cauliflower ear.

Source: wiktionary.org