Definition of bound verb from the Oxford Advanced Learner's Dictionary

bound

verb
baʊnd
 
; baʊnd
 
 
see also bind v.
1 [intransitive] + adverb/preposition to run with long steps, especially in an enthusiastic wayThe dogs bounded ahead.2 [transitive, usually passive] bound something (formal) to form the edge or limit of an areaThe field was bounded on the left by a wood.