This is the 11727th most frequent French word.
signera
"Signera" means "will sign" (future tense of the verb "signer").
This use of 'signera' refers to the act of signing as an action involving agreement or authorization in the future tense.
Marie signera le contrat demain.
Marie will sign the contract tomorrow.
Here, 'signera' is used to imply the necessity of completing a signature due to time constraints, again in the future tense.
Le séminaire commencera tôt, donc elle le signera rapidement.
The seminar will start early, so she will sign it quickly.
This usage of 'signera' indicates an immediate action of signing following a conditional event, expressed in the future tense.