to join or unite to form a larger organization or group, or to make separate organizations do this(使)联合;(使)合并
The electricians' union is planning to amalgamate with the technicians' union.电工工会正计划与技工工会联合。
The different offices will be amalgamated as/into employment advice centres.这几家不同的事务所将合并成为就业指导中心。