Definify.com

Webster 1913 Edition

Adj.

Pertaining to, abounding with, or resembling, tin.

“The tinny strand.”

Drayton.

Adj.

Abounding with tin.

tinny ‎(comparative tinnier or more tinny, superlative tinniest or most tinny)

Of or pertaining to or resembling tin.
The object had a tinny appearance.
Pertaining to the thinness and cheapness of tin or similar-looking metals, in contrast to a heavier, more valuable metal.
The shop was filled with tinny tourist geegaws.
Pertaining to a thin, unpleasant sound recalling that of tin being rapped.
The piano was not simply out of tune, but had become downright tinny.