from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A short, high-pitched sound, such as that made by a small bird or an insect.
- intransitive v. To make a short, high-pitched sound.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A short, sharp or high note or noise, as of a bird or insect.
- v. to make a short, sharp, cheerful note, as of small birds or crickets
- v. to speak in a high-pitched staccato
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To make a shop, sharp, cheerful, as of small birds or crickets.
- n. A short, sharp note, as of a bird or insect.
from The Century Dictionary and Cyclopedia
- To make a short, sharp, cheery sound, as is done by small birds and various insects.
- To utter inarticulate sounds expressive of satisfaction or pleasure.
- To sound or utter in a chirping manner.
- n. A short, sharp, cheerful note, as of certain birds and insects.
- To cheer; enliven: known only in the present participle.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a sharp sound made by small birds or insects
- v. sing in modulation
- v. make high-pitched sounds
Middle English *chirpen, of imitative origin.(American Heritage® Dictionary of the English Language, Fourth Edition)