Definition of tenses:
(n) :
(linguistics, uncountable) The property of indicating the point in time at which an action or state of being occurs or exists.
(n) :
(linguistics, grammar, countable) An inflected form of a verb that indicates tense.
(adj) :
Showing signs of stress or strain; not relaxed.
(adj) :
Characterized by strain (on the nerves, emotions, etc). (Compare charged.)
(adj) :
Pulled taut, without any slack.
(v) :
(grammar, transitive) To apply a tense to.