thinner

From Wiktionary

Pronunciation[change]

Adjective[change]

Positive
thin

Comparative
thinner

Superlative
thinnest

  1. The comparative form of thin; more thin.

Noun[change]

Singular
thinner

Plural
thinners

  1. A thinner is a liquid that is used to make another liquid more thin.
    Turpentine can be used as a thinner for oil-based paints.