Someone or something that is remarkable or unusual.
A dilly bag.
A kind of stagecoach.
In plain English: A dilly was an old-fashioned horse-drawn carriage used for long journeys.
"The weary travelers piled their belongings into the back of the old dilly and set off down the dusty road."
Usage: Dilly (noun) refers specifically to an old-fashioned, four-wheeled carriage or stagecoach, particularly one used in the 18th and 19th centuries. It's a somewhat archaic term; you likely won't encounter it outside historical fiction or discussions of transportation history.
Redolent of dill (the herb).
Silly; characteristic of a dill.
In plain English: Playful and goofy.
"The cat chased its tail in a dilly fashion."
Usage: Use "dilly" as an adjective to describe something playfully silly or whimsical, often with a lighthearted and slightly absurd quality. It's rarely used in formal writing.
A surname, from French.