hash marknnoun: Refers to person, place, thing, quality, etc.
井字号，#号 jǐng zì hào，háo / hào
To abbreviate the word "number" in English, just use the hash mark.
hash [sth] outvtr phrasal sepphrasal verb, transitive, separable: Verb with adverb(s) or preposition(s), having special meaning, divisible--for example, "call off" [=cancel], "call the game off," "call off the game."
informal (negotiate, discuss [sth])
Peter and Frank hashed out their differences and are friends again. Ella and I have finally hashed out the details of our business plan.