pin down


verb (tr, adverb)

to force (someone) to make a decision or carry out a promise
to define clearlyhe had a vague suspicion that he couldn't quite pin down
to confine to a placethe fallen tree pinned him down

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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Idioms and Phrases with pin down

pin down

1

Fix or establish clearly, as in The firefighters finally were able to pin down the source of the odor. [Mid-1900s]

2

Force someone to give precise information or opinions, as in The reporter pinned down the governor on the issue of conservation measures. [c. 1700]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.