Ambulacrum is an architectural word that denotes an atrium, courtyard, or parvise in front of a basilica or church that is surrounded by arcades or colonnades, or trees, and which often contains a fountain. It also can denote a walking path that trees delineate.

In the Roman architecture, the term ambulatio or ambulacrum was used to designate walkways or corridors delineated on both sides by plants or colonnades.

From the Latin 'ambulācrum', meaning 'walk planted with trees', 'avenue', 'alley' and 'walking place' Derives from' 'ambulāre', meaning 'to walk' or 'Amble' meaning 'To walk slowly or leisurely'.

Has Indo-European roots - deriving from 'Ambhi'