In Oceanic languages, elements that function or used to function as directional verbs of motion—'go', 'come', and 'return'—undergo a variety of grammaticalization processes. This study is an investigation of the semantic aspects of those developments, the factors that motivate the functional extensions, and the relations among the meanings/functions of the etyma. It is human conceptualization of phenomena (viz. metaphor and metonymy) that directly motivates the developments. Even though the various meanings/functions of an etymon are all historically related, synchronically there need not be any property exclusively shared by all of them. The nature of the motivations for the functional extensions provides support for the view of meaning as essentially subjective and open-ended.