It's possible it's:
* A misspelling: Perhaps it's meant to be "soliloquise", meaning to speak one's thoughts aloud when by oneself or regardless of any hearers, especially by a character in a play.
* A regional dialect term: Some words are specific to certain regions.
* A technical term: It could be a specialized word in a particular field, like music or science.
* A made-up word: Sometimes people invent words, especially in creative writing or online slang.
Can you provide more context? For example:
* Where did you encounter this word?
* What was the surrounding text or conversation?
With more information, I can help you figure out what "solomise" might mean.