1. Set so close together as to be invulnerable to penetration
2. Securely or solidly fixed in place; rigid
3. Packed closely together
4. Of such close construction as to be impermeable
5. Closely constrained or constricted or constricting
6. (Economics) Affected by scarcity and expensive to borrow
1. Fast, tightly, firmly
2. In a sound manner; soundly