fast

Definitions

• (dated) Firmly or securely fixed in place; stable.
• Firm against attack; fortified by nature or art; impregnable; strong.
• (of people) Steadfast, with unwavering feeling. (Now mostly in set phrases like fast friend (fast friend(s)).)
• Moving with great speed, or capable of doing so; swift, rapid.
• Causing unusual rapidity of play or action.
• (computing) Able to transfer data in a short period of time.
• Deep or sound (of sleep); fast asleep (of people).
• (of dyes or colours) Not running or fading when subjected to detrimental conditions such as wetness or intense light; permanent.
• (obsolete) Tenacious; retentive.
• (dated) Having an extravagant lifestyle or immoral habits.
• Ahead of the correct time or schedule.
• (of photographic film) More sensitive to light than average.