Definition of "Gilbert" :

noun: United States architect who influenced the development of the skyscraper (1859-1934)

noun: English navigator who in 1583 established in Newfoundland the first English colony in North America (1539-1583)

noun: English court physician noted for his studies of terrestrial magnetism (1540-1603)

noun: a librettist who was a collaborator with Sir Arthur Sullivan in a famous series of comic operettas (1836-1911)

noun: a unit of magnetomotive force equal to 0.7958 ampere-turns