Definition of "inflection" []

• The act of inflecting or the state of being inflected. (noun)
• Alteration in pitch or tone of the voice. (noun)
• Grammar An alteration of the form of a word by the addition of an affix, as in English dogs from dog, or by changing the form of a base, as in English spoke from speak, that indicates grammatical features such as number, person, mood, or tense. (noun)
• Grammar An affix indicating such a grammatical feature, as the -s in the English third person singular verb form speaks. (noun)
• Grammar The paradigm of a word. (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.

• "His responses are delivered without so much as even a change in inflection, always acknowledging the absurdity of his circumstances and the unfortunate reality that has come as a result."
• "Years after 9/11, I learned in math class that the bottom-most point on a parabola is known as an inflection point - the point where the slope of the line goes from negative to positive."
• "Years after 9/11, I learned in math class that the bottom-most point on a parabola is known as an inflection point -- the point where the slope of the line goes from negative to positive."