* enPR: pēk, IPA(key): /piːk/ * Rhymes: -iːk * Homophones: peek, peke, pique

NOUN PEAK (_plural_ PEAKS) * A point; the sharp end or top of anything that terminates in a point; as, the peak, or front, of a cap. * The highest value reached by some quantity in a time period. _The stock market reached a PEAK in September 1929._ * 2012 October 23, David Leonhardt, "[1]," _New York Times_ (retrieved 24 October 2012): By last year, family income was 8 percent lower than it had been 11 years earlier, at its PEAK in 2000, according to inflation-adjusted numbers from the Census Bureau. * (geography) The top, or one of the tops, of a hill, mountain, or range, ending in a point; often, the whole hill or mountain, especially when isolated; as, the Peak of Teneriffe. * (nautical) The upper aftermost corner of a fore-and-aft sail; -- used in many combinations; as, peak-halyards, peak-brails, etc. * (nautical) The narrow part of a vessel's bow, or the hold within it. * (nautical) The extremity of an anchor fluke; the bill. * (mathematics) A local maximum of a function, e.g. for sine waves, each point at which the value of _y_ is at its maximum. SYNONYMS * apex, pinnacle, top, summit * See also Wikisaurus:apex DERIVED TERMS * peakless * peaklike * peakwise TRANSLATIONS VERB PEAK (_third-person singular simple present_ PEAKS, _present participle_ PEAKING, _simple past and past participle_ PEAKED) * To reach a highest degree or maximum. _Historians argue about when the Roman Empire began to PEAK and ultimately decay._ * To rise or extend into a peak or point; to form, or appear as, a peak. * Holland There PEAKETH up a mighty high mount. SYNONYMS * culminate DERIVED TERMS * off-peak TRANSLATIONS

Unknown VERB PEAK (_third-person singular simple present_ PEAKS, _present participle_ PEAKING, _simple past and past participle_ PEAKED) * (intransitive) To become sick or wan. * (intransitive) To acquire sharpness of figure or features; hence, to look thin or sickly. * Shakespeare Dwindle, PEAK, and pine. * (intransitive) To pry; to peep slyly. (Can we find and add a quotation of Shakespeare to this entry?)

VERB PEAK (_third-person singular simple present_ PEAKS, _present participle_ PEAKING, _simple past and past participle_ PEAKED) * Misspelling of _pique_.