well defined 
adjective
Clearly defined or described: without well-defined goals it is likely that efforts will be misdirected...
- There have always been clear and well-defined roles for the village Eurovision party.
- He has well-defined square, straight shoulders and a muscular chest kept remarkably youthful by a healthy exercise regimen.
- His brief was therefore clear and well-defined but he exceeded it.
- Lethean
- letherwite
- Leticia
- let in (or out) the clutch
- let it all hang out
- let it be (or make something) known
- let me see
- let me see (or think)
- let me tell you
- Leto
- let-off
- let off steam
- let on
- let oneself go
- let oneself in for
- let one's hair down
- let (or blow) off steam
- let out
- let-out clause
- let rip
- let's
- let's face it (or let's be honest)
- let sleeping dogs lie
- let slip
- let someone down