From Middle English *chirpen (attested only in the derivative Middle English chirpinge, cyrpynge, chyrypynge (“chirping”). Compare Middle English chirken and chirmen. More at chirk, chirm. Compare also Middle English chirten (“to smack, chirrup”). Compare German zirpen and Dutch tjirpen.
Meanings
A short, sharp or high note or noise, as of a bird or insect.
(qualifier:radar; sonar; radio telescopy etc.; radar; sonar; radio telescopy etc.) A pulse of signal whose frequency sweeps through a band of frequencies for the duration of the pulse; the quality of having a such a variation in frequency.
The long fiber lengths required to linearize the chirp can then be used […] 1985, D. Strickland, & G. Moreau, “Compression of amplified chirped optical pulses”, in Optics Communications, volume 56, number 3, pages 219-221:
From Middle English *chirpen (attested only in the derivative Middle English chirpinge, cyrpynge, chyrypynge (“chirping”). Compare Middle English chirken and chirmen. More at chirk, chirm. Compare also Middle English chirten (“to smack, chirrup”). Compare German zirpen and Dutch tjirpen.
Meanings
(intransitive) To make a short, sharp, cheerful note, as of small birds or crickets; to chitter; to twitter.
"Well, I suppose you didn't come out of the egg either before you could chirp," said the woman who was on the egg. 1886, Peter Christen Asbjørnsen, translated by H.L. Brækstad, Folk and Fairy Tales, page 95:
(intransitive) To speak in a high-pitched staccato.
(qualifier:radar; sonar; radio telescopy etc.; radar; sonar; radio telescopy etc., transitive) To modify (a pulse of signal) so that it sweeps through a band of frequencies throughout its duration.
(obsolete, transitive) To cheer up; to make (someone) happier.
(Canada) To speak rapid insulting comical banter back and forth; to bicker or argue.
(UK, obsolete, slang) To inform on someone; snitch.