Third-person singular simple present indicative form of pass muster

Amanita caesarea, an edible mushroom with a distinctive orange cap.

(US) A mildly spicy brown mustard.

(slang) A very old item, especially an obsolete piece of technology.

A product that one is strongly recommended to buy.

A book, article, etc. that one is strongly recommended to read.

plural of mushroom body

Obsolete form of book muslin.

(now historical) A kind of fine muslin sold folded in a book-like manner and used for women's clothing.

(humorous) To be tone-deaf.