1. covered or enclosed by a culvert (an underground channel or pipe for water)
Usage: technical/engineering; usually used in passive constructions or as a past participle adjective

Examples

• The culverted stream runs beneath the highway without being visible.
• Engineers designed a culverted drainage system to manage stormwater runoff.
• The culverted portion of the creek was inspected for debris and damage.
• Many urban waterways have become culverted over the past century.
• The city plans to restore the culverted river to an open channel.