The verb imagine has 2 senses (first 2 from tagged texts)
1. (66) imagine, conceive of, ideate, envisage -- (form a mental image of something that is not present or that is not the case; "Can you conceive of him as the president?")
2. (11) think, opine, suppose, imagine, reckon, guess -- (expect, believe, or suppose; "I imagine she earned a lot of money with her new novel"; "I thought to find her in a bad state"; "he didn't think to find her in the kitchen"; "I guess she is angry at me for standing her up")