Lexical Definition

‎βάσις‎ básis (bas'-ece) foot ^G:N-F
from (to walk)

foot.

• a pace ("base"), i.e. (by implication) the foot

Abbott-Smith

βάσις, -εως, ἡ (< βαίνω), [in LXX chiefly for אֶדֶן;]
1. a step (Æsch., al.).
2. Hence, a foot (Plat.; Wi 13:18): Ac 3:7.†

Abbott-Smith References

Liddell-Scott-Jones

βάσις [ᾰ], εως, ἡ,

(βαίνω) stepping, step, and collectively, steps, [Refs 5th c.BC+]power to step, [Refs 5th c.BC+]; τροχῶν βάσεις the rolling of the wheels, the rolling wheels, [Refs]; ἀρβύλης β. the print of the sandal, [Refs 5th c.BC+]

__2 measured stepor movement, β. χορείας [Refs 5th c.BC+]: hence, rhythmical or metrical movement, [Refs 5th c.BC+]: in Rhet., rhythmical close of a sentence, [Refs 2nd c.AD+]; clause forming transition from πρότασις to ἀπόδοσις, [Refs]: and in Metric, metrical unit, monometer, [Refs 4th c.BC+]
__3 order, sequence, θέσις καὶ β. [Refs 4th c.BC+]
__II that with which one steps, a foot, [Refs 5th c.BC+]; θηλύπους β. their women's feet, [Refs]; β. δίχηλος, of the ostrich, [NT+1st c.BC+]; leg, [Refs 2nd c.AD+]
__III that whereon one stands, base, pedestal, [κρατῆρος] [Refs 2nd c.AD+]; of statues, [Refs 2nd c.BC+]; of an engine, [Refs 2nd c.BC+]; of a column, [Refs 3rd c.BC+]; of the heart, [Refs 2nd c.AD+]; foundation, basement, ῥίζα πάντων καὶ β. ἁ γᾶ ἐρήρεισται [Refs 5th c.BC+]; so, of the soil, πεδίων σπορίμα β. [Refs]
__III.2 Geometry texts, base of a solid or plane figure, [Refs 5th c.BC+]; [κώνου] [Refs 4th c.BC+]
__IV position, fixedness, opposed to φορά, etymology of βέβαιος, [Refs 5th c.BC+]
__V Astrology texts, ={ὡροσκόπος}, [Refs 2nd c.AD+]

_{LSJ Scripture Refs: Acts.3.7}