Definition of "droop" []

• To bend or hang downward: "His mouth drooped sadly, pulled down, no doubt, by the plump weight of his jowls” ( Gore Vidal). (verb-intransitive)
• To bend or sag gradually: flowers drooping in the midday heat. (verb-intransitive)
• To sag in dejection or exhaustion: drooped from lack of sleep. (verb-intransitive)
• To let bend or hang down: "He drooped his body over the rail” ( Norman Mailer). (verb-transitive)
• The act or condition of drooping. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The phenomenon, called droop, has been a focus of Mr. Nakamura and other faculty members at University of California, Santa Barbara, including Soraa co-founders Steve DenBaars and James Speck ."
• "Eventually, though, the leaves will begin to droop, which is a sure sign it needs water."
• "It seems that wife, Maureen was keen to try something a little different to avoid the traditional, emotional disappointment inflicted upon her spirit by the annual Xmas tree 'droop' in the Roberts household."