Properly, the leaf, or flat part of the leaf, of any plant,
especially of gramineous plants. The term is sometimes applied to the
spire of grasses.

The cutting part of an instrument; as, the blade of a knife
or a sword.

The broad part of an oar; also, one of the projecting arms
of a screw propeller.

The scapula or shoulder blade.

The principal rafters of a roof.

The four large shell plates on the sides, and the five large
ones of the middle, of the carapace of the sea turtle, which yield the
best tortoise shell.

A sharp-witted, dashing, wild, or reckless, fellow; – a
word of somewhat indefinite meaning.

To furnish with a blade.

To put forth or have a blade.