No longer acceptable, usable, or practical: an outworn penal code; outworn clothes. (adjective)
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.
Use "outworn" in a sentence
"But empire demands discipline, the coordination of all forces and a deeply felt sense of duty and sacrifice: this fact explains many aspects of the practical working of the regime, the character of many forces in the State, and the necessarily severe measures which must be taken against those who would oppose this spontaneous and inevitable movement of Italy in the twentieth century, and would oppose it by recalling the outworn ideology of the nineteenth century – repudiated wheresoever there has been the courage to undertake great experiments of social and political transformation; for never before has the nation stood more in need of authority, of direction and order."
"For them, the slogans of antifascism were not "outworn" — indeed, they had, perhaps, even more emotional resonance when the fascist menace seemed to have infected their America and to threaten them personally."
"An objection is not "outworn" until answered, and to speak of the demise of a generally accepted theory is hardly scientific."