1) Irregular 2) Noncyclic 3) Nonoscillatory 4) Nonperiodic 5) Not periodic 1) Nonoscillatory 2) Nonperiodic 
pertaining to a non-oscillating change from one steady state to another
Not occurring periodically. ... (05 Mar 2000) ... 
Type: Term Pronunciation: ā-pēr′ē-od′ik Definitions: 1. Not occurring periodically.
[adj] - not recurring at regular intervals
Vibrations or oscillations with no apparent period. See also: Periodic, Vibration.
Non-oscillating. Applied for example, to the need of an instrument, usually a compass, which is so designed that, after a slight lag, it indicates the correct reading with no over-swing.
nonperiodic adjective not recurring at regular intervals
Refers to a type of bass-cabinet loading. An aperiodic enclosure type usually features a very restri
not periodic; irregular. · of or pertaining to vibrations or oscillations with no apparent period.