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Occurring without periodicity; irregular.

a′pe·ri·od′i·cal·ly adv.
a·pe′ri·o·dic′i·ty (-ə-dĭs′ĭ-tē) n.


1. not periodic; not occurring at regular intervals
2. (General Physics) physics
a. (of a system or instrument) being damped sufficiently to reach equilibrium without oscillation
b. (of an oscillation or vibration) not having a regular period
c. (of an electrical circuit) not having a measurable resonant frequency
ˌaperiˈodically adv
aperiodicity n


(ˌeɪ pɪər iˈɒd ɪk)

1. not periodic; irregular.
2. Physics. of or pertaining to vibrations or oscillations with no apparent period.
a`pe•ri•od′i•cal•ly, adv.
a•pe`ri•o•dic′i•ty (-əˈdɪs ɪ ti) n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.aperiodic - not recurring at regular intervals
periodic, periodical - happening or recurring at regular intervals; "the periodic appearance of the seventeen-year locust"
References in periodicals archive ?
Each VI schedule specified that food became available aperiodically, with the average time between successive food availabilities equal to the schedule value (e.
Consider that directors are often involved with multiple business ventures and interests outside the boardroom, and meet periodically, or in some cases aperiodically, to be updated on corporate matters.
Additionally, all the standard services are available in subscription format allowing the customer the flexibility to choose when and how the services are delivered (on-site or off-site, periodically or aperiodically and announced or unannounced).