noun
(uncountable) A state of the body or mind caused by exhaustion or disease and characterized by a languid or weary feeling; lassitude; (countable) an instance of this.
(uncountable) Melancholy caused by lovesickness, sadness, etc.; (countable) an instance of this.
(uncountable) Dullness, sluggishness; lack of vigour; stagnation.
(uncountable) Listless indolence or inactivity, especially if enjoyable or relaxing; dreaminess; (countable) an instance of this.
(uncountable) Heavy humidity and stillness of the air.
(uncountable, obsolete) Sorrow; suffering; also, enfeebling disease or illness; (countable, obsolete) an instance of this.
verb
(intransitive) To languish.