open sentence

Mathematics. an equation or inequality containing one or more variables in which its truth or falsehood depends upon the values assumed by the variables in a particular instance, as the equation x + 3 = 8.
Logic. a propositional function that contains a free variable, as “ x is a man.”

1935–40 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
open sentence
logic propositional function, Also called: sentential function an expression containing a free variable that can be replaced by a name to yield a sentence, as x is wise

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
Create and write a word problem to match a given open sentence with a single variable and one operation.
The student will create a problem situation based on a given open sentence using a single variable.
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