Definitions for "DROPDOWN"
Keywords:  arrow, selection, text, menu, clicking
a text object with an attached selection list
This is a kind of menu. In a dropdown menu, you would typically see a box with some text in it. That text is your current selection. To the right of the box would be an arrow. Clicking on the arrow would display all of the other selections you can make.
Keywords:  rivals, horse, class, lower, running
a horse facing a lower class of rivals than he had been running against.