Wiktionary
alt. (context US English) A type of bread which is leavened with agents other than yeast (such as baking soda plus an acid) and thus rises more quickly. n. (context US English) A type of bread which is leavened with agents other than yeast (such as baking soda plus an acid) and thus rises more quickly.
WordNet
n. breads made with a leavening agent that permits immediate baking
Wikipedia
Quick bread is any bread leavened with leavening agents other than yeast or eggs. An advantage of quick breads is their ability to be prepared quickly and reliably, without requiring the time-consuming skilled labor and the climate control needed for traditional yeast breads.
Quick breads include many cakes, brownies and cookies—as well as banana bread, beer bread, biscuits, cornbread, muffins, pancakes, scones, and soda bread.