Definition

Adjective: Lasting for the duration of a month; continuing through an entire month.

Usage

The adjective "monthlong" is used to describe an event, activity, or state that has a duration of approximately one month. It is typically placed before the noun it modifies.

Examples

• The company implemented a monthlong training program for all new employees.
• After the hurricane, many areas were without power for a monthlong period.
• The festival is a monthlong celebration of local arts and culture.

Advanced Usage

• As a predicate adjective: While less common, "monthlong" can follow a linking verb.
  • The research expedition was monthlong and highly productive.
• Hyphenation: The word is a closed compound ("monthlong"), though it is sometimes seen hyphenated ("month-long") in less formal contexts. The closed form is standard.

Variants and Related Words

• Month-long (adj): An alternative, often interchangeable spelling of "monthlong."
• Monthly (adj, adv): Occurring, done, or payable every month. (e.g., a magazine; paid ).
• Bimonthly (adj, adv): Occurring every two months OR twice a month (this word has two conflicting meanings, so context is key).

Synonyms

• Four-week
• Thirty-day (approximate)

Antonyms

• Brief
• Short-term
• Ephemeral

Notes on Meaning

"Monthlong" specifically denotes a continuous span of time. It is not used for events that happen intermittently over a month (for that, "monthly" or "throughout the month" would be more appropriate).

Adjective

1. last through a month
   • a monthlong stay in the hospital