a person who is experienced in or familiar with a subject, area, procedure, etc.: The guide you just hired is an old hand at leading safaris.
Origin of old hand
First recorded in 1775–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for old hand
Like a Washington old-hand, Brown knows that all the attention is good for the coffers.
He had been sent up to have a look at the battle line, with an old-hand observer and instructions not to cross the trenches.Cavalry of the Clouds|Alan Bott
British Dictionary definitions for old hand
a person who is skilled at something through long experience
Australian informal (in the 19th century) an ex-convict
Australian informal a person who is long established in a place
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