Serious; staid; businesslike.
Of a collar, able to be buttoned down to the shirt, as over a necktie.
Conservative; conventional; unimaginative.
A shirt with a button-down collar
Generally accepted, used, practiced, or prevalent at the moment.
Electric; of or relating to electricity.
Existing or occurring at the moment.
a tendency or a course of events
The generally unidirectional movement of a gas or fluid.
the amount of electric charge flowing in each unit of time.
The part of a fluid that moves continuously in a certain direction, especially (oceanography) short for ocean current.