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/ˈdeɪˌbɔːd/ · noun
(nautical) A shape affixed to the top of a sea mark or other aid to navigation (ATON) to indicate its status by day..
Use dayboard when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Dayboard means (nautical) A shape affixed to the top of a sea mark or other aid to navigation (ATON) to indicate its status by day..
Common synonyms include day beacon, daymark.
The opposite depends on the specific sense.
Use dayboard where its definition matches the intended context.
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