Quick Definition: To end an interaction by gaining a woman’s contact information (phone, e-mail) or if on a date, progressing into 2nd, 3rd or 4th base.
Full Definition:
This term comes from sales, and is sometimes used by players or naturals not in the community as a pop culture term. Usually it means a kiss close in lieu of additional context. However this strongly depends on the PUA speaking: close could mean f-close for one PUA, but a number close for another.
Related Terms: Kiss close, f-close, @close, 4close
Source: FastSeduction