Definition of legend for English Language Learners. : 1  a story from the past that is believed by many people but cannot be proved to be true. : 2  a famous or important person who is known for doing something extremely well. : 3  a list that explains the symbols on a map.
glaÂ·cis. n. pl. glacis. 1. a. A gentle slope; an incline. b. A slope extending down from a fortification.
1 (military) A gentle incline in front of a fortification. ( 2 military) The angled armour plate on the front of a tank; glacis plate. ( 3 postal service) A device for sorting mail which slides parcels across a sloped surface.