English Reference
adverb

closely

adv.
US /ˈkɫoʊsɫi/ UK /klˈəʊsli/ close·ly

  1. 01 B1 Intermediate

    to look at or listen to something very carefully to see every detail.

    with intense focus and attention to detail; used when observing or monitoring a situation.

    Simple

    If you look closely at the photo, you can see a bird in the tree.

    In context

    The security team monitored the crowd closely, looking for any signs of suspicious activity as the VIP arrived at the venue.

    carefullyattentivelythoroughly
  2. 02 B2 Upper Intermediate

    having a very direct or strong relationship with someone or something.

    denoting a strong or intimate connection, often regarding collaboration or causal relationships.

    Simple

    The two companies work closely together on new technology projects.

    In context

    The researchers found that dietary habits were closely linked to the development of certain chronic conditions in the study group.

    distantlyloosely
  3. 03 B2 Upper Intermediate

    near to something else, with very little space or time in between.

    in a position of physical proximity or occurring in rapid succession.

    Simple

    The runner was followed closely by his rival during the final lap.

    In context

    The second explosion followed the first so closely that many witnesses initially thought they were a single event.

Don't confuse

closely vs close — Close describes physical or temporal proximity, while closely describes the degree of attention or the tightness of a connection.

Usage closely related · closely linked · closely connected

She said decisions to reopen roads were being taken on a street-by-street basis, with the council working closely with emergency services.

BBC News· 15 Aug 2026

Which is why scientists are watching the ocean so closely.

BBC News· 14 Jul 2026

From close + -ly.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Common
Updated