More than 1400 terms useful in wildland and related resource planning are defined. The purpose of the work is to facilitate communication between professionals, not to provide them with exhaustive vocabularies of each other's specialties. Definitions are drawn from many sources, including public laws and government manuals, but are not intended to establish legally binding definitions. A list of terms and list of sources are included. Charles Schwarz is a landscape architect in the Station's research unit on forest recreation and landscape planning, at Berkeley. Before joining the Station staff in 1975, he was a research assistant at the University of California's Institute of Urban and Regional Development, Berkeley. Edward C. Thor is an economist with the research unit. He was formerly a post-graduate research economist at the University of California, Berkeley, on assignment to the Station under a cooperative agreement. Gary H. Elsner is in charge of the unit.