29. A method, comprising: receiving an indication of initiation of a search, of a stored interactive dictionary database, by a user via an integrated input and display device; displaying an electronic screen overlay including a plurality of polysemous symbols on the integrated input and display device, usable for searching the interactive dictionary database, to the user; receiving, via the integrated input and display device, an indication of input of text usable for searching; determining whether or not at least one entry in the interactive dictionary database includes a previously stored at least one word, sentence, phoneme, message, letter, number, morpheme, command and/or phrase corresponding to the input text; and displaying on the integrated input and display device, upon determining that one or more entries in the interactive dictionary database includes a previously stored at least one word, sentence, phoneme, message, letter, number, morpheme, command and/or phrase corresponding to the input text, a definition of the determined one or more identified entries in the interactive dictionary database, wherein the definition includes a sequence of symbols including at least one of the plurality of polysemous symbols of the electronic screen overlay, at least a subset of the plurality of polysemous symbol sequences being assignable by a user at least one of an active and an inactive status, wherein when an inactive status is assigned to one of the plurality of polysemous symbol sequences, a corresponding sequence of previously selectable symbols of the keyboard is rendered unselectable by the user.
29. A method, comprising: receiving an indication of initiation of a search, of a stored interactive dictionary database, by a user via an integrated input and display device; displaying an electronic screen overlay including a plurality of polysemous symbols on the integrated input and display device, usable for searching the interactive dictionary database, to the user; receiving, via the integrated input and display device, an indication of input of text usable for searching; determining whether or not at least one entry in the interactive dictionary database includes a previously stored at least one word, sentence, phoneme, message, letter, number, morpheme, command and/or phrase corresponding to the input text; and displaying on the integrated input and display device, upon determining that one or more entries in the interactive dictionary database includes a previously stored at least one word, sentence, phoneme, message, letter, number, morpheme, command and/or phrase corresponding to the input text, a definition of the determined one or more identified entries in the interactive dictionary database, wherein the definition includes a sequence of symbols including at least one of the plurality of polysemous symbols of the electronic screen overlay, at least a subset of the plurality of polysemous symbol sequences being assignable by a user at least one of an active and an inactive status, wherein when an inactive status is assigned to one of the plurality of polysemous symbol sequences, a corresponding sequence of previously selectable symbols of the keyboard is rendered unselectable by the user. 30. The method of claim 29 , wherein the displayed electronic screen overlay includes at least a search term field for receipt of the input text.