Antonyms of adj messy

1 sense of messy

Sense 1
messy, mussy -- (dirty and disorderly; "a mussy fussy bedroom"; "a child's messy eating habits")

INDIRECT (VIA untidy) -> tidy -- (marked by order and cleanliness in appearance or habits; "a tidy person"; "a tidy house"; "a tidy mind")

Similarity of adj messy

1 sense of messy

Sense 1
messy, mussy -- (dirty and disorderly; "a mussy fussy bedroom"; "a child's messy eating habits")
       => untidy (vs. tidy) -- (not neat and tidy; "careless and untidy in her personal habits"; "an untidy living room"; "untidy and casual about money")