To sign on the opposite side of (a document).
To add a second signature to a document, affirming the validity of the signature of another person.
A second signature added to a document to affirm the validity of the signature of the first person.
The response to a sign or signal.
To signal in a vehicle the desire to turn right or left.
To show or manifest by symptoms; to point to as the proper remedies.
To point out; to discover; to direct to a knowledge of; to show; to make known.
To investigate the condition or power of, as of steam engine, by means of an indicator.