lengthy

lengthy — adjective

1. lasting much longer than expected, or containing more words or pages than needed

1.adjectiveB2
Definition

lasting much longer than expected, or containing more words or pages than needed, often in a way that feels tiring

Example

Asher had to sit through a lengthy meeting about office cleaning schedules.

collocation: lengthy meeting

The doctor's explanation was so lengthy that Minh forgot the first part before she finished.

predicative: was + lengthy + that-clause showing consequence

Common collocations
  • lengthy meeting
  • lengthy process
  • lengthy discussion
  • lengthy delay
  • lengthy speech
  • lengthy document
  • lengthy explanation
  • lengthy report
  • lengthy investigation
  • lengthy pause
Synonyms
  • long

    neutral and more common than 'lengthy'; works for any duration without implying a negative judgement

  • protracted

    more formal, emphasises that something continues far longer than expected, often in a negative sense

  • prolonged

    suggests something lasts longer than usual, often with a feeling of impatience or difficulty

  • extended

    can be neutral or positive; often suggests a deliberate lengthening rather than an unwanted duration

Antonyms
  • brief

    short in duration; the direct opposite in time contexts

  • short

    general opposite for both time and size

Grammar Patterns

lengthy + [noun]

be / become / seem + lengthy

Usage Note

More formal and often more negative in tone than the neutral word 'long'. Common after nouns like meeting, process, speech, document, delay, and explanation to imply that something has taken or required too much time or space.

Common Mistakes

The Amazon River is lengthy.
The Amazon River is long.
'lengthy' is not used for neutral description of physical size; use 'long' instead.
I had a lengthy sleep last night.
I had a long sleep last night.
'lengthy' sounds unnatural for positive or neutral experiences; 'long' works better.

Word family

Synonym discussion

Sense: adjective/1

All five words describe something that takes up more time than average, but they differ in tone and context. 'Long' is the most neutral and common — it simply states duration without judgement ('a long flight'). 'Lengthy' adds a critical edge, suggesting something is longer than necessary or wanted ('a lengthy committee meeting'). 'Prolonged' emphasises that something continues beyond what is normal, often with a sense of impatience ('a prolonged illness'). 'Protracted' is the most formal and implies an unwanted extension, often through delay or difficulty ('protracted negotiations'). 'Extended' can be neutral or even positive, hinting at a deliberate lengthening ('an extended holiday'). Use 'long' for everyday neutral description; use 'lengthy' or 'prolonged' when you want to convey that the duration was excessive or burdensome.

long ↗lengthy ↗protractedprolongedextended ↗

Common collocations

Nouns

Adverbs

  • rather lengthy
  • somewhat lengthy
  • unduly lengthy
  • increasingly lengthy
  • particularly lengthy

Phrases

  • lengthy period of time
  • lengthy legal battle
  • lengthy application process

Etymology

Old EnglishMiddle EnglishEnglish

Formed by adding the suffix '-y' to the noun 'length', giving the meaning 'having length'. First recorded in English in the late 16th century. Before 'lengthy' became common, writers used 'long' for both neutral and extended duration. 'Lengthy' emerged as a more formal and slightly critical alternative, often suggesting that something is longer than desirable.