Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun lacuna

2 senses of lacuna

Sense 1
lacuna, blank -- (a blank gap or missing part)
       => gap, crack -- (a narrow opening; "he opened the window a crack")

Sense 2
coffer, caisson, lacuna -- (an ornamental sunken panel in a ceiling or dome)
       => panel -- (sheet that forms a distinct (usually flat and rectangular) section or component of something)