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what does ancillary staff mean

The term 'staff' has many uses: as a verb, 1. provide with staff; 2. serve on the staff of; and as a noun, 1. personnel who assist their superior in carrying out an assigned task; 2. a strong rod or stick with a specialized utilitarian purpose; 3. the body of teachers and administrators at a school; 4. building material consisting of plaster and hair; used to cover external surfaces of temporary structure (as at an exposition) or for decoration; 5. a rod carried as a symbol.