| Landy |
| Last train cuebid |
| Lavinthal signal |
| Law of balanced distribution |
| Law of symmetry |
| Law of total tricks |
| Lead through |
| Lead through strength |
| Lead up to |
| Lead up to weakness |
| Lead-directing bid |
| Lead-directing double |
| Lead-directing raises |
| Lead-inhibiting bid |
| Leads |
| Leap |
| Leave in |
| Lebensohl |
| Lebensohl applications |
| Lebovic asking bid |
| Length signals |
| Lightner double |
| Limit |
| Limit bid |
| Limit jump raise |
| Limit jump raise to show a singleton |
| Limit raise |
| Limit responses |
| LOL |
| Loser on loser |
| Losers |
| Losing-trick count |
| Lower minor |
