(Canada, US, colloquial) Kind of. / (slang) In a low-key or surreptitious manner; secretively; on the down-low.

(computing) A developer who maintains the Linux kernel code.

(physics) A specialized form of a Wheatstone bridge network designed to eliminate the effect of lead and contact resistance and thus permit accurate measurement of low resistances.

(idiomatic) To keep someone attentive, active, busy or alert.

(idiomatic) To keep quiet; to keep a secret; to not tell.

(computing) A certificate that uses a digital signature to bind together a public key with an identity — used to verify that a public key belongs to an individual.

(idiomatic, colloquial) To be authentic, true to oneself; to be cool. / (idiomatic, colloquial) In the imperative, an exhortation used as a departing salutation.

Alternative form of goalkeeper

Relaxed, unstressful, not pressured.

(ichthyology) A lateral ridge found just anterior to each side of the tail fin on the caudal peduncle of some types of fast-swimming fish. The keels improve the stability of the fish's attitude at speed in the water, and strengthen the support of the caudal fin.