Pronunciation: (thin'ur),[key] —n. 1. a volatile liquid, as turpentine, used to dilute paint, varnish, rubber cement, etc., to the desired or proper consistency.
2. a person who adds thinners to paints, varnishes, etc.
3. a person who specializes in weeding plants, pruning shrubbery, thinning fruit, etc.
Pronunciation: (thin'ur),[key] —adj. comparative of thin.