The noun attachment can be countable or uncountable. In more general, commonly used, contexts, the plural form will also be attachment. However, in more specific contexts, the plural form can also be attachments e.g. in reference to various types of attachments or a collection of attachments.

How do you use attachment in a sentence?

(2) He has a strong sentimental attachment to the place. (3) They discussed the attachment of new conditions to the peace plans. (4) The attachment of the new engine to the car only took a few minutes. (5) As a teenager she formed a strong attachment to one of her teachers.

Is attachment countable or uncountable?

2[uncountable, countable] the act of joining one thing to another; a thing that joins two things together All cars built since 1981 have points for the attachment of safety restraints.