- (adverb) to undertake (something or doing something); commence or begin
Idioms and Phrases with start in
Begin, as in He started in serving, without taking any practice. [Late 1800s] Also see start out.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.