(adverb when intr, often foll by on) to acquire information about (a subject) by reading intensively
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
Related Words for read upponder, consider, read, examine, learn, think, plug, plunge, lucubrate, inquire, peruse, dig, mind, refresh, grind, tutor, meditate, weigh, cram, cogitate
Study or learn by reading, as in I don't know much about childhood illnesses, but I can always read up on them. [First half of 1800s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.