Dagger \Dag"ger\ (-g[~e]r), n. [Cf. OE. daggen to pierce, F. daguer. See Dag a dagger.]

1. A short weapon used for stabbing. This is the general term: cf. Poniard, Stiletto, Bowie knife, Dirk, Misericorde, Anlace.

2. (Print.) A mark of reference in the form of a dagger [[dagger]]. It is the second in order when more than one reference occurs on a page; -- called also obelisk.

Dagger moth (Zo["o]l.), any moth of the genus Apatalea. The larv[ae] are often destructive to the foliage of fruit trees, etc.

Dagger of lath, the wooden weapon given to the Vice in the old Moralities. --Shak.

Double dagger, a mark of reference [[dag]] which comes next in order after the dagger.

To look, or speak, daggers, to look or speak fiercely or reproachfully.

Source: Webster's Revised Unabridged Dictionary (1913)