the first stage of a multistage rocket
an additional dose that makes sure the first dose was effective
a person who backs a politician or a team etc.
someone who is an active supporter and advocate
an individual or group or structure or other entity regarded as a structural or functional constituent of a whole
any division of quantity accepted as a standard of measurement or exchange
an organization regarded as part of a larger social group
an assemblage of parts that is regarded as a single entity
