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/ˈwɔːtə(ɹ)laɪn/ · noun
(nautical) A line formed by the surface of the water on the hull of a ship when she is afloat; any of a series of short lines marked on the hull to show where the waterline would be under different loadings.
Down here along the waterline, the Enterprise has a belt of thick antitorpedo armor. It's not too promising.
Use waterline when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Waterline means (nautical) A line formed by the surface of the water on the hull of a ship when she is afloat; any of a series of short lines marked on the hull to show where the waterline would be under different loadings.
Common synonyms include water line, water level.
The opposite depends on the specific sense.
Down here along the waterline, the Enterprise has a belt of thick antitorpedo armor. It's not too promising.
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