Surveilling

Surveilling means monitoring or closely observing a person, place, network, or system over time. In cybersecurity, surveilling can describe monitoring networks and systems for suspicious activity, threats, or signs of compromise. The related noun is surveillance, which refers to the act or practice of conducting that monitoring or observation.

Yes. “Surveilling” is the standard present-participle form of the verb “surveil.” The verb is spelled surveil, the past tense is surveilled, and the -ing form is surveilling. Common search variants such as “surveiling” or “survailing” are misspellings, even though they may appear frequently in informal online searches.

Surveilling describes the action of monitoring something, while surveillance is the noun for the monitoring activity itself. For example, a security team may be surveilling network traffic as part of ongoing surveillance. In cybersecurity, both terms can refer to observing systems, events, or communications to identify threats or unusual behavior.