Definition of "prepositional" [prep•o•si•tion•al]

• Relating to or used as a preposition. (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.

• "The last group falls into what I call prepositional trouble, as in That one threw me over the deep end."
• "Dictionary. com says that “whom” is the object form of “who” which, if I remember correctly, means in prepositional phrases (after the words to, for, by, etc.)."
• "A 133 page dissent over a 2 word prepositional phrase is silly."