attach

• at‧tach
• 1 [transitive] to fasten or connect one object to another [= fix]
• attach something to something
• Attach a recent photograph to your application form.
• a small battery attached to a little loudspeaker
• the attached form/cheque/leaflet etc
• Please fill in and return the attached reply slip.
• 2

   be attached to somebody/something

  to like someone or something very much, because you have known them or had them for a long time:
• It's easy to become attached to the children you work with.
• 3

   attach importance/significance etc to something

  to believe that something is important:
• People attach too much importance to economic forecasts.
• 4 [intransitive and transitive] if blame attaches or is attached to someone, they are responsible for something bad that happens:
• No blame can be attached to Roy for the incident.
• 5 [intransitive and transitive] if a quality, feeling, idea etc attaches or is attached to a person, thing, or event, it is connected with them
• attach to
• It's easy to let the emotions attached to one situation spill over into others.
• 6

   be attached to something

• a) to work for part of a particular organization, especially for a short period of time:
• He was attached to the foreign affairs department of a Japanese newspaper.
• b) to be part of a bigger organization:
• The Food Ministry is attached to the Ministry of Agriculture.
• 7 [transitive] to connect a document or file to an email so that you can send them together
• 8

   attach yourself to somebody

  to join someone and spend a lot of time with them, often without being invited or welcome:
• A young man from Canada had attached himself to Sam.
• 9

   attach a condition (to something)

  to allow something to happen, but only if someone agrees to do a particular thing or accept a particular idea:
• When approving a merger, the commission can attach conditions.
• 10

   attach a label to somebody/something

  to think of or describe someone or something as being a particular thing, especially in a very general way :
• You can't really attach a label to this type of art.

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.