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A tangled mass of floating vegetal matter obstructing navigation. [Central Africa]

Increase in height; elevation; rise. Little River affords navigation during a swell to within three miles of the Miami. Jefferson.

pecially the triangle. Trinity House, an institution in London for promoting commerce and navigation, by licensing pilots, ordering and erecting beacons, and the like. -- Trinity Sunday, the Sunday next after Whitsunday; -- so called from the feast held on that day in honor of the Holy Trinity. -- Trinity term. (Law)…

A general name for any hollow structure made to float upon the water for purposes of navigation; especially, one that is larger than a common rowboat; as, a war vessel; a passenger vessel. [He] began to build a vessel of huge bulk. Milton.