Verb

To form a mental image of something; to envision or create something in one's mind.

* Shakespeare

In the night, imagining some fear, / How easy is a bush supposed a bear!

* {{quote-magazine, date=2013-06-14, author=(Jonathan Freedland)

, volume=189, issue=1, page=18, magazine=(The Guardian Weekly) , title= Obama's once hip brand is now tainted , passage=Now we are liberal with our innermost secrets, spraying them into the public ether with a generosity our forebears could not have imagined . Where we once sent love letters in a sealed envelope, or stuck photographs of our children in a family album, now such private material is despatched to servers and clouds operated by people we don't know and will never meet.}}

To believe in something created by one's own mind.

To assume.

To conjecture or guess.

To use one's imagination.

(obsolete) To contrive in purpose; to scheme; to devise.

* Bible, Psalms lxii. 3

How long will ye imagine mischief against a man?

Verb

(reminisc)

To recall the past in a private moment, often fondly or nostalgically.

To talk or write about memories of the past, especially pleasant memories.