To see visual hallucinations or imagine things that are not really there. There's no dog in the back yard—you're seeing things. I could have sworn the contract said we were entitled to a lower price, but I must have been seeing things.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
imagining that one sees someone or something that is not there. Lisa says that she saw a ghost, but she was just seeing things. I thought I was seeing things when Bill walked into the room. Someone had told me he was dead.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
Experiencing hallucinations or delusions, as in I thought I saw my father, but I must have been seeing things; he died twenty years ago . [First half of 1900s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ˈsee/ˈhear things(informal) see/hear things that are not really there: So it was you that was playing the piano! I thought I was hearing things. ♢ (humorous) Tom’s washing the dishes — I must be seeing things!
Farlex Partner Idioms Dictionary © Farlex 2017