(grammar) A feature of a verb which denotes that its action or condition does not have a fixed temporal boundary, but is habitual, unfinished, continuous, repetitive or in progress.

(grammar) A temporal feature of the verb which denotes the speaker's standpoint of the event described by the verb, as from outside of the event and seeing it as a completed whole.

(grammar) A subclass of perfective verbs that denotes a momentary or punctiliar action (e.g., to sneeze, to blink).

(grammar) A subclass of imperfective verbs that denote a continuously repeated action. An example in English would be the iterative verb sniffle, as opposed to the noniterative sniff.

(computing) Describing a system which has been written so that different subsystems appear to add themselves to the main business logic without that logic having to include them explicitly.

plural of aspect ratio

(grammar) A feature of the verb which specifies an action as occurring habitually, usually, ordinarily, or customarily

(rail transport) The visual appearance of a railway signal

(grammar) A property of verbs and other predicates indicating internal temporal nature; aktionsart.

(grammar, semantics) The aspect of a verb phrase or other predicate – its temporal structure or relationship to the time of use – marked through any of various grammatical elements, as distinguished from lexical aspect.