The Collaborative International Dictionary of English v.0.48:
Trap \Trap\, n. [OE. trappe, AS. treppe; akin to OD. trappe,
OHG. trapo; probably fr. the root of E. tramp, as that which
is trod upon: cf. F. trappe, which is trod upon: cf. F.
trappe, which perhaps influenced the English word.]
1. A machine or contrivance that shuts suddenly, as with a
spring, used for taking game or other animals; as, a trap
She would weep if that she saw a mouse
Caught in a trap. --Chaucer.
2. Fig.: A snare; an ambush; a stratagem; any device by which
one may be caught unawares.
Let their table be made a snare and a trap. --Rom.
God and your majesty
Protect mine innocence, or I fall into
The trap is laid for me! --Shak.
3. A wooden instrument shaped somewhat like a shoe, used in
the game of trapball. It consists of a pivoted arm on one
end of which is placed the ball to be thrown into the air
by striking the other end. Also, a machine for throwing
into the air glass balls, clay pigeons, etc., to be shot
4. The game of trapball.
5. A bend, sag, or partitioned chamber, in a drain, soil
pipe, sewer, etc., arranged so that the liquid contents
form a seal which prevents passage of air or gas, but
permits the flow of liquids.
6. A place in a water pipe, pump, etc., where air accumulates
for want of an outlet.
7. A wagon, or other vehicle. [Colloq.] --Thackeray.
8. A kind of movable stepladder. --Knight.
Trap stairs, a staircase leading to a trapdoor.
Trap tree (Bot.) the jack; -- so called because it
furnishes a kind of birdlime. See 1st Jack.