source: By Paul Goyette - https://www.flickr.com/photos/pgoyette/222810961/, CC BY-SA 2.0

1. a channel for conveying water or other fluid:

(水･ガスなどの)導管, パイプ, 水路

e.g. a conduit for conveying water to the power plant.

a person or organization that acts as a channel for the transmission of something:

｟かたく｠ 【情報･金･武器･麻薬などの】仲介人［国］, 運び屋; ルート, 媒介 «for» .

e.g. the office acts as a conduit for ideas to flow throughout the organization.

2. a tube or trough for protecting electric wiring:

電線管, コンジット

e.g. the gas pipe should not be close to any electrical conduit.

Middle English: from Old French, from medieval Latin conductus, from Latin conducere ‘bring together’ (see conduct).