Definition of "forever" in English

adverb

1. (duration) For all time, for all eternity; for a lifetime; for an infinite amount of time.

   • I shall love you forever.

2. (duration, colloquial, hyperbolic) For a very long time, a seeming eternity.

   • We had to wait forever to get inside.
   • That was forever ago.

3. (frequency) Constantly or frequently.

   • You are forever nagging me.

noun

1. (countable, colloquial) An extremely long time.

   • I haven't seen him in forever!
   • It took me forever to make up my mind.
   • Don't spend forever on the phone!
   • She should've been here five forevers ago!

2. (uncountable, colloquial or poetic) A mythical time in the future that will never come.

   • Sure, I'd be happy to meet with you on the 12th of forever.

adjective

1. (chiefly informal) Permanent, lasting; constant, perpetual.