subject to agreement by others and finalization of details: an ad referendum contract
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
How to use ad referendum in a sentence
In other words, I have only voted "ad referendum," and I ask that my statement be entered in the protocol.
Those of Amsterdam remain here, because they have no need of an ad referendum.
The other cities have taken the proposition ad referendum; and the final resolution on it will be taken by the next Assembly.
My journey has gained the time which would have been lost, if they had, on re-assembling here taken the thing ad referendum.
But as I see no authority for it other than mere tradition, I believe my share of it, and take it ad referendum.From London to Land's End | Daniel Defoe