squeak

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To give forth a short, shrill cry or sound.
• intransitive verb Slang To turn informer.
• intransitive verb To utter in a thin, shrill voice.
• noun A short shrill cry or sound, such as that made by a mouse or a rusty hinge.
• noun An escape.

from The Century Dictionary.

• noun A short, sharp, shrill cry, such as that uttered by pigs or mice, or made by a wheel or the hinge of a door when dry.
• To utter a short, sharp, shrill cry, as a pig or a rat; make a sharp noise, as a pipe or fife, a wheel or hinge that needs oiling, or the sole of a boot.
• To break silence or secrecy; speak out; turn informer; “squeal”; peach.
• To shirk an obligation, as the payment of a debt.
• To utter with a squeak, or in a squeaking tone.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To utter a sharp, shrill cry, usually of short duration; to cry with an acute tone, as an animal; or, to make a sharp, disagreeable noise, as a pipe or quill, a wagon wheel, a door; to creak.
• intransitive verb colloq. To break silence or secrecy for fear of pain or punishment; to speak; to confess.
• noun A sharp, shrill, disagreeable sound suddenly uttered, either of the human voice or of any animal or instrument, such as is made by carriage wheels when dry, by the soles of leather shoes, or by a pipe or reed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A short, high-pitched sound, as of two objects rubbing together, or the calls of small animals.
• noun games A card game similar to group solitaire.
• verb intransitive To emit a short, high-pitched sound.
• verb intransitive, slang To inform, to squeal.
• verb transitive To speak or sound in a high-pitched manner.
• verb intransitive, games To empty the pile of 13 cards a player deals to themself in the card game of the same name.
• verb intransitive, informal To win or progress by a narrow margin.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun something achieved (or escaped) by a narrow margin
• verb make a high-pitched, screeching noise
• noun a short high-pitched noise