This document provides definitions for 15 words: blast from the past, basement, bossy, drop out, great-aunt, hippie, homesick, sweetheart, crop, dedicated, invader, observation deck, pilgrim, spring, and veranda. It defines each word concisely in 1-2 sentences. It also provides definitions for 4 additional words: devastating, step, strike, and happen suddenly. The document defines a total of 19 words through brief, straightforward definitions.