English Dictionary

fast

/fɑːst/

adj

(dated) Firmly or securely fixed in place; stable. / Firm against attack; fortified by nature or art; impregnable; strong.

The old bookshelf was fast to the wall.

意味（1）

(dated) Firmly or securely fixed in place; stable.

That rope is dangerously loose. Make it fast!

意味（2）

Firm against attack; fortified by nature or art; impregnable; strong.

out-lawes […] lurking in woods and fast places

意味（3）

(of people) Steadfast, with unwavering feeling. (Now mostly in set phrases like fast friend(s).)

I still hear you sayin', Dear one, hold me fast

意味（4）

Moving with great speed, or capable of doing so; swift, rapid.

意味（5）

(nuclear physics, of a neutron) Having a kinetic energy between 1 million and 20 million electron volts; often used to describe the energy state of free neutrons at the moment of their release by a nuclear fission or nuclear fusion reaction (i.e., before the neutrons have been slowed down by anything).

Plutonium-240 has a much higher fission cross-section for fast neutrons than for thermal neutrons.

意味（6）

Of a place, characterised by business, hustle and bustle, etc.

Sydney is a fast city, and the pace is becoming increasingly more frantic.

意味（7）

Causing unusual rapidity of play or action.

a fast racket, or tennis court

意味（8）

(computing, of a piece of hardware) Able to transfer data in a short period of time.

意味（9）

Deep or sound (of sleep); fast asleep (of people).

Since his majesty went into the field, I have seen her rise from her bed, throw her nightgown upon her, unlock her closet, take forth paper, fold it, write upon’t, read it, afterwards seal it, and again return to bed; yet all this while in a most fast sleep.

意味（10）

(of dyes or colours) Not running or fading when subjected to detrimental conditions such as wetness or intense light; permanent.

All the washing has come out pink. That red tee-shirt was not fast.

意味（11）

(obsolete) Tenacious; retentive.

Roses, damask and red, are fast flowers of their smells.

意味（12）

(dated) Having an extravagant lifestyle or immoral habits.

a fast woman

意味（13）

Ahead of the correct time or schedule.

There must be something wrong with the hall clock. It is always fast.

意味（14）

(of photographic film) More sensitive to light than average.