3.American EnglishAmETBB a small window over a door or over a larger window 门顶窗,楣窗,气窗SYN British English fanlight
Examples from the Corpus
transom• Above, its transom is covered with plywood and nailed tightly shut.• We had no trouble getting up the tree, but the transom was too high for Mrs Boatwright.• The Wheel was made fast, resting on the transom and trailing in the water.• We climbed out the transom and walked through the cool fall night to our cars at the high school.• Leaning over the transom, Whitworth succumbed to his seasickness.• In the arthritic wind, we hung a fishing line over the transom and dragged it behind us.• Reaching the transom, he tied the catchnet to the portside rudder.
Origintransom
(1300-1400) Probably from Latintranstrum, from trans“across”