0 Something that is watertight prevents any water from entering it. -- wodoszczelny
1 A watertight reason or excuse is one that no one can prove is false. -- niepodważalny
a watertight alibi
A submerged rock had ripped through six water-tight compartments of the hull, from the bows to the engine room.
In addition, joints and fissures in the dam were re-grouted again but with a water-tight resin epoxy.
Acceptable usage include other access points that may be capped with alternate materials providing an air- or water-tight access to other vessels.
To prevent corrosion and mechanical problems, the turret is made water-tight by rubber joints.
Water-tight sub-divisions were carefully designed; and there were seven water-tight bulkheads extending up to the main deck.
She is fully compliant to the highest standards of modern ocean-going passenger ships, with steel water-tight bulkheads, down-flooding valves, and fire-fighting equipment.
No shingles are water-tight so the minimum recommended roof pitch is 4:12 without additional underlayment materials.
Once applied it was smoothed before drying to create an air- and water-tight barrier against the elements.
