3d

noun1

1. •
   thruppence, threepence, a coin valuing three pennies

adjective1

1. •
   Abbreviation of three-dimensional.

noun2

1. •
   A three-dimensional video.

   • A man Ellaby's own size was sitting there, viewing a 3D. When he heard Ellaby at the door he got up. — 1955
2. •
   A system capable of recording or displaying three-dimensional video.

   • No, the slightest imbalance there would have alarms flashing all over the room. Probably it was the fact that he knew the threedee was a little out of whack. — 1969

adjective2

1. •
   (slang) In real life, as opposed to in an anime.
2. •
   Abbreviation of three-dimensional.

   • Listings with a 3D tour also garnered more interest, drawing 66% more visitors and 90% more saves in April than those without. — 2020