a deposit in an account.
Origin of pay-in
noun use of the verb phrase pay in
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
(tr, adverb) to hand (money, a cheque, etc) to a cashier for depositing in a bank, etc
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