OBSERV'ING, participle present tense s as z. 1. Taking notice by the eye or the intellect. 2. Remarking. 3. Keeping; adhering to in practice; fulfilling. 4. adjective Giving particular attention; habitually taking notice; attentive to what passes. He is an observing man.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI