The way in which something is expressed; style of expression. The phraseology of the legal document was complex and difficult to understand.
A particular set of words or expressions used by a specific group or in a particular context. The phraseology of the medical profession can be confusing to those not familiar with it.
The branch of linguistics that studies fixed expressions such as idioms and collocations; the study of set phrases. Phraseology plays an important role in lexicography and translation studies.