Reference Centre, Genealogy 101
Answers to Genealogy FAQs - 1881 Census and N.D.
N.D. in relation to an occupation has generally been used to signify a non-domestic employee. This abbreviation crops up frequently in the large houses, estates, farms, hotels, etc. where it was common to employ outsiders for specific duties. Gardeners at these types of places were often referred to as non-domestics having been employed by the owners for a specific length of time for specific duties but not having been taken on as part of the regular staff.