1. stainer - Noun
2. Stainer - Proper noun
A workman who stains; as, a stainer of wood.
Source: Webster's dictionaryIn the past, instruments by Nicolò Amati and Jacob Stainer were preferred for their subtle sweetness of tone. Source: Internet
Stainer and Barrett used the word as a singular substantive: "Lyric, poetry or blank verse intended to be set to music and sung". Source: Internet