2. To adjust; to fine-tune: "The company may have to tweak the software program once more."
2. In a twitter refers to being very nervous or excited about something: "She was all in a twitter about the birthday party."
3. A mini-blogging social-network service that lets a person update friends on what is going on at any particular moment: "Twitter allows blog posts of only 140 characters, which is just large enough for a sentence, or two, if they are very short."
4. A social networking and micro-blogging service that allows its users to send and to read other users' updates (known as tweets): "In March, 2009, Garry Trudeau's Doonesbury strip started to satirize Twitter, with the strip characters ironically highlighting the triviality of tweets and Roland, a character in the strip, defending the need to keep up with the constant-update trend or lose relevance in today's society."
In Garry Trudeau's "Doonesbury" comic strip of March 6, 2009, the last frame has a banner saying: Tweets for Twits.
The twit organized a twitter in order to tweak plans for the tweetup; however, although the twit used the twitter service, unfortunately there was a twitter who kept interrupting the efforts to tweet the twit's friends.
2. A speaker with a movable flat metal diaphragm and a non-movable metal electrode capable of reproducing high audio frequencies.
The diaphragm is driven by the varying high voltages applied across it and the electrode.
Ionic speakers are capable of extremely extended high-frequency response (up to 100 kHz or so) because of the extreme lightness of the ionic "diaphragm".