What does "cornflour" mean?

A very fine starch powder derived from corn (maize) used in cooking as a thickener, to keep things from sticking, or as an anti-caking agent.

What is a synonym for "cornflour"?

Common synonyms include: cornstarch, maize starch.

Pronounced //ˈkɔːn.flaʊə//.

/ˈkɔːn.flaʊə/ noun

noun ·Rare ·Advanced level

Noun

1
A very fine starch powder derived from corn (maize) used in cooking as a thickener, to keep things from sticking, or as an anti-caking agent. British, uncountable, usually
2
starch prepared from the grains of corn; used in cooking as a thickener wordnet
3
A flour for baking and cooking that is ground from corn (maize). uncountable, usually

"Cornflour is good for thickening soup."

From corn + flour. Piecewise doublet of cornflower.