dis

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To show disrespect to, often by insult or criticism.

from The Century Dictionary.

• noun In Roman mythology, a name sometimes given to Pluto, and hence to the infernal world.
• noun An abbreviation of discount.
• noun In Norse mythol., a guardian spirit.
• noun In printing, an abbreviation of distribution, that is, dead type which is to be distributed into the various boxes of the type-case. See distribution, 3, and distribute, v. i., 2.
• noun A prefix of Latin origin (in other forms di-, dif-), in force— separative or disjunctive, ‘apart,’ ‘asunder,’ ‘in different directions,’ etc., as in distend, dispart, dissident, etc., this force being often only indistinctly felt in the English word, as in dispose, dissent, distract, etc., and passing even in Latin into a merely intensive use, not felt at all in English, as in dispute; privative or negative, like the English un-, reversing or negativing the primitive, as in dissimilar, etc., having come, in this use, from its frequency in Middle Latin and Old French, to be recognized as a regular English prefix, and as such usable with almost any verb and adjective, as in disable, disesteem, disfavor, disoblige, disfellowship, etc., and in colloquial or dialectal use in such forms as disremember, disrecollect, etc.

from the GNU version of the Collaborative International Dictionary of English.

• proper noun The god Pluto, god of the underworld; also called Dis Pater.
• transitive verb slang to treat in a disrespectful manner; to insult, disparage or belittle.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb informal Alternative spelling of diss.
• noun Alternative form of diss.
• noun Any of a group of minor female deities in Scandinavian folklore.
• determiner this
• pronoun this

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun god of the underworld; counterpart of Greek Pluto