From Longman Dictionary of Contemporary Englishfield marshalˈfield ˌmarshal noun [countable] PMAan officer of the highest rank in the British army
Examples from the Corpus
field marshal• She was born in 1895 to an army major and his wife and was granddaughter to a field marshal.• Lady Astor of Hever, daughter of first world war field marshal Earl Haig, has died aged 81. 