Pinker says read with a dictionary

Readers who want to become writers should read with a dictionary at hand (several are available as smartphone apps), and writers should not hesitate to send their readers there if the word is dead-on in meaning, evocative in sound, and not so obscure that the reader will never see it again.

Steven Pinker, The Sense of Style: The Thinking Person's Guide to Writing in the 21st Century (New York: Viking, 2014), ch. 1