• WordNet 3.6
    • n trainbearer one who holds up the train of a gown or robe on a ceremonial occasion
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Webster's Revised Unabridged Dictionary
    • n Trainbearer One who holds up a train, as of a robe.
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Century Dictionary and Cyclopedia
    • n trainbearer One who holds up the train of a robe; especially, such a person appointed to attend on the sovereign or some high official on an occasion of ceremony.
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In literature:

Subtle scent followed her like a trainbearer.
"A Bed of Roses" by W. L. George