Keywords: imagine, visualise, envisage, conceive, image, concept, imagination, conception, picture
As a Noun
The ability you have to form ideas and pictures of new or exciting things in your mind. English = imagination.
The idea or picture you have of something in your mind. English = concept, conception, notion.
As a Verb or Adjective
To think of something and to form a picture of it in your mind. English = imagine, picture, visualise, conceive, conceive of.