The Collaborative International Dictionary of English v.0.48:
Heimdallr \Heimdallr\ n. Same as Heimdal. Syn: Heimdall, Heimdal. [WordNet 1.5]WordNet (r) 3.0 (2006):
Heimdallr n 1: (Norse mythology) god of dawn and light; guardian of Asgard [syn: Heimdall, Heimdal, Heimdallr]