"Acquiring knowledge of a word in the richest sense is a long process that involves multiple exposures in many contexts." (Yopp, R. H., & Yopp, H. K., 2007, p. 157)
Within the context of this book vocabulary refers to the words that a student can define in isolation. Vocabulary is developed through repeated contextual exposures to a word in reading and oral language, and reinforced through usage in writing and speech. Vocabulary may also be built through more traditional direct instruction consisting of memorizing definitions of words.
record a word the author used that you did not know the meaning of. Record the page the word was used on, its definition, and how you found out what it meant.
record an interesting word the author used. Record the page the word was used on, and list several antonyms (or close opposites) of the word.
record an unusual word the author used. Record the page the word was used on, and name a character from somewhere other than the book you are reading that might use that same word.