Completion (SLIME User Manual, version 2.28)

### 3.4 Completion commands

Completion commands are used to complete a symbol or form based on what is already present at point. Classical completion assumes an exact prefix and gives choices only where branches may occur. Fuzzy completion tries harder.

`M-TAB` ¶
`M-x slime-complete-symbol`

  Complete the symbol at point. Note that three styles of completion are available in SLIME; the default is similar to normal Emacs completion (see slime-completion-at-point-functions).