Definitions
1.nounA louse.
2.nounDicky dirt = a shirt, meaning a shirt with a collar.
3.nounA detachable shirt front, collar or bib.
4.nounA hat, especially (in the US) a stiff hat or derby, and (in the UK) a straw hat.
5.nounA seat behind a carriage, for a servant.
6.nounA seat in a carriage, for the driver.
7.nounThe luggage storage compartment of a sedan/saloon style car."Can you open the dicky for me?"
8.nounA leather apron for a gig, etc.
9.nounA small bird; a dicky-bird.
10.noun(in negative constructions) An insignificant sound or thing; dicky-bird.
11.nounA pilot.
12.nounA hedge sparrow.
13.nounA donkey.
14.nounA haddock.
15.adjectiveDoubtful, troublesome; in poor condition"He had a dicky heart."