CGI
n. uncountable B2 Upper Intermediate US //ˌsiˌɡiˈaɪ// cgi
n. Stands for Computer-Generated Imagery. Computer-generated images used in movies, video games, and TV shows to create realistic or imaginary scenes.
n. Abbreviation for Computer-Generated Imagery. Visual content created using computer software, typically used in film, television, and video games to depict scenes that are difficult or impossible to film in reality.
The dragon in the movie is CGI.
The film uses CGI to show the city as it looked fifty years ago.
Modern blockbusters rely heavily on CGI to create fantastical worlds that would be prohibitively expensive to build with physical sets.