There are nine modes of interpreting: Consecutive interpreting, Sight translation, Simultaneous interpreting, Out-of-Booth interpreting, Whispering interpreting, Liaison interpreting, Phone interpreting, Sign Language interpreting, & Conference interpreting.
Language interpretation is the practice of facilitating oral & sign-language communication, either simultaneously or consecutively, between or more users of different languages. Functionally, interpreting & interpretation are both descriptive words for this process.
In professional practice, interpreting denotes the act of facilitating communication from language form in to its equivalent, or approximate equivalent, in another language form. Interpretation denotes the actual product of this work, that is, the message as thus rendered in to speech, sign language, writing, non-manual signals, or other language form. This important distinction is observed to keep away from confusion.
Functionally, an interpreter is a that converts a thought or expression of a source language in to an expression with a comparable meaning in a target language in "real time". The interpreter's function is to convey every semantic element (tone & register) & every purpose & feeling of the message that the source-language speaker is directing to the target-language recipients.