somnambulatory is not in our dictionary (yet). Here's what it could mean:

Example Sentences

Examples are provided to illustrate usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Gatsby took an arm of each of us and moved forward into the restaurant whereupon Mr. Wolfshiem swallowed a new sentence he was starting and lapsed into a somnambulatory abstraction.

From " The Great Gatsby" by F. Scott Fitzgerald

But they felt uneasy all the same; for Mr. Twist, though he plied them with buttered toast and macaroons and was as attentive as usual, had a somnambulatory quality in his attention.

From Christopher and Columbus by Elizabeth