Having a powerful effect on action or opinion. Of argument, evidence, proof, etc.: likely to succeed because of sound reasoning or convincing…

Firmly or solidly established; of solid worth or value; of real significance, weighty; reliable… Of a statement, discourse, writing.

Of a person or the mind: full of ideas; imaginative, inventive; resourceful; (of wit) quick, sharp. Now rare.

= pregnant, adj.2 Obsolete.

Of proof, evidence, etc.: powerfully convincing; strong, forcible, cogent. Now rare.

Forcefully or incisively expressed; (of argument, opinion, etc.) convincing, persuasive; sharply critical; (of censure) trenchant, biting.

Of reasoning: that compels assent, convincing.