attachment

noun

1. (countable, uncountable)The act or process of (physically or figuratively) attaching.

   “The “implantation window” is a short, specific phase during which attachment of the blastocyst occurs.”

2. (countable, uncountable)A strong bonding with or fondness for someone or something.

   “I have such an attachment towards my fiancé!”

3. (countable, uncountable)A dependence, especially a strong one.

   “Through every other kind of drug experience, however, ran his attachment to alcohol.”

4. (countable, uncountable)A device attached to a piece of equipment or a tool.

   “Zimchenko's phone had a tape attachment, […]”

5. (countable, uncountable)The means by which something is physically attached.

   “[The umbilical cord is] the attachment connecting the fetus with the placenta.”

6. (countable, uncountable)A file sent along with a message, usually an email.
7. (countable, uncountable)Taking a person's property to satisfy a court-ordered debt.

   “attachment of earnings”

8. (countable, uncountable)The act or process by which any (downward) leader connects to any available (upward) streamer in a lightning flash.

   “2009, Jakke Mäkelä, Eero Karvinen, Niko Porjo, Antti Mäkelä and Tapio Tuomi, Attachment of Natural Lightning Flashes to Trees: Preliminary Statistical Characteristics, published in the Journal of Lightning Research, volume 1”