This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Without a sign or signs.

Making no sign or manifestation; quiet; passive.

Having no algebraical sign, or being essentially positive, like the modulus of an imaginary, a tensor, etc.

"She suggested Hipster Pho, the stark, signless hipster mecca in an otherwise abandoned strip mall on Sunset and Silverlake Blvd, right next to the big "Escrow" sign that's missing a letter or two."

cankerless    mutilate    rethink    unshakeable    somnambulistic