Definition of "prop up" [prop up]

• To support with, or as if with, a prop. (verb)

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• "People without rooms huddled in the alleyways, using whatever scrap of solid material they could find to prop up over themselves for a roof."
• "The board, influenced by luxury-goods tycoon Bernard Arnault and U.S. private-equity firm Colony Capital LLC has pushed to prop up the sagging share price by trying to sell assets."
• "This, par parenthese, will be thought cool language by persons who entertain solemn doctrines about the angelic nature of children, and the duty of those charged with their education to conceive for them an idolatrous devotion: but I am not writing to flatter parental egotism, to echo cant, or prop up humbug; I am merely telling the truth."