n. 1. An act of refusing or of being refused; as, to get a turndown in an application for a job, a grant, etc. [ PJC ]

2. A decline in activity, especially business; a downturn; as, they expect a turndown in housing construction in the fall. [ PJC ]

a. 1. Capable of being turned down; specif. (Elec.), Designating, or pertaining to, an incandescent lamp with a small additional filament which can be made incandescent when only a small amount of light is required. [ Webster 1913 Suppl. ]

2. Made to wear with the upper part turned down; as, a turndown collar. [ Webster 1913 Suppl. ]